Exhibit 99.01

News Release

FOR IMMEDIATE RELEASE

Symantec Reports Record First Quarter Fiscal 2012 Results

MOUNTAIN VIEW, Calif. – July 27, 2011 – Symantec Corp. (Nasdaq: SYMC) today reported the results of its first quarter of fiscal year 2012, ended July 1, 2011. GAAP revenue for the fiscal first quarter was $1.653 billion, up 15 percent year-over-year and up 9 percent after adjusting for currency.

“The current threat landscape continues to be toxic and targeted. In addition, information is growing at unprecedented rates. As a result, customers increasingly understand the value of our unique portfolio and are expanding their commitment to Symantec. For the fourth consecutive quarter, we exceeded all of our key financial metrics,” said Enrique Salem, president and chief executive officer, Symantec. “We are capitalizing on new growth opportunities in cloud, mobile and virtualization and will continue to deliver new solutions to help both consumers and enterprises securely access and use information across multiple devices and platforms.”

“Our third consecutive quarter of double digit bookings growth resulted in the strongest June quarter revenue, deferred revenue and operating cash flow in Symantec’s history,” said James Beer, executive vice president and chief financial officer, Symantec. “Our record results were driven by strength in backup, data loss prevention and consumer as well as ongoing stability in the storage and availability management business. In addition, our authentication business once again exceeded expectations and delivered its fourth consecutive quarter of better than expected results.”

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Symantec Reports First Quarter Fiscal 2012 Results

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GAAP Results: GAAP operating margin for the first quarter of fiscal year 2012 was 17.1 percent compared with 13.5 percent for the same quarter last year. GAAP net income for the fiscal first quarter was $172 million compared with net income of $161 million for the year-ago period. GAAP diluted earnings per share were $0.22 compared with $0.20 for the year ago quarter, an increase of 10 percent year-over-year.

GAAP deferred revenue as of July 1, 2011, was $3.689 billion compared with $2.998 billion as of July 2, 2010, up 23 percent year-over-year and up 17 percent after adjusting for currency. Cash flow from operating activities for the first quarter of fiscal year 2012 was $503 million compared with $335 for the year ago period, an increase of 50 percent year-over-year. Symantec ended the quarter with cash, cash equivalents and short-term investments of $2.297 billion.

Non-GAAP Results: Non-GAAP operating margin for the first quarter of fiscal year 2012 was 27.0 percent compared with 26.5 percent for the same quarter last year. Non-GAAP net income for the first quarter was $309 million compared with $284 million for the year-ago period, an increase of 9 percent year-over-year. Non-GAAP diluted earnings per share were $0.40 compared with earnings per share of $0.35 for the year-ago quarter, an increase of 14 percent year-over-year.

During the first quarter of fiscal year 2012, Symantec repurchased 10 million shares for $198 million at an average price of $18.98. Symantec has $679 million remaining in the current board authorized stock repurchase plan.

Business Segment and Geographic Highlights

For the quarter, Symantec’s Consumer segment represented 32 percent of total revenue and increased 11 percent year-over-year (5 percent after adjusting for currency). The Security and Compliance segment represented 28 percent of total revenue and increased 31 percent year-over-year (24 percent after adjusting for currency). The Storage and Server Management segment represented 36 percent of total revenue and increased 14 percent year-over-year (7 percent after adjusting for currency). Services represented 4 percent of total revenue and declined 20 percent year-over-year (24 percent after adjusting for currency), as expected due to the company’s move to a partner-led consulting model. Growth rates for the Security and Compliance and Services segments include the impact of moving Managed Security Services from the Services segment into the Security and Compliance segment.

International revenue represented 52 percent of total revenue in the first quarter of fiscal year 2012 and increased 21 percent year-over-year (8 percent after adjusting for currency). The Europe, Middle East and Africa region represented 29 percent of total revenue for the quarter and increased 16 percent year-over-year (2 percent after adjusting for currency). The Asia Pacific/Japan revenue for the quarter represented 18 percent of total revenue and increased 29 percent year-over-year (15 percent after adjusting for currency). The Americas, including the United States, Latin America and Canada, represented 53 percent of total revenue and increased 11 percent year-over-year on an actual and currency-adjusted basis.

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Symantec Reports First Quarter Fiscal 2012 Results

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Acquisition Highlights

For the quarter, the VeriSign security business performed better than expected across all metrics, generating revenue of $74 million ahead of our $70 million forecast. The earnings per share accretion of half a penny was a penny and a half better than expected. In addition, $3 million of revenue was realized from the Clearwell acquisition, which was completed ahead of schedule in the June quarter.

Second Quarter Fiscal Year 2012 Guidance

Guidance assumes an exchange rate of $1.43 per Euro for the September 2011 quarter versus the actual weighted average rate of $1.30 and an end of period rate of $1.38 per Euro for the September 2010 quarter.

For the second quarter of fiscal year 2012, ending Sept. 30, 2011, revenue is estimated between $1.655 billion and $1.675 billion, up 12 to 13 percent year-over-year as reported.

GAAP diluted earnings per share are estimated between $0.21 and $0.22. Non-GAAP diluted earnings per share are estimated between $0.38 and $0.39.

Deferred revenue is expected to be in the range of $3.485 billion and $3.515 billion, up 12 to 13 percent year-over-year as reported and in line with seasonal patterns.

Conference Call

Symantec has scheduled a conference call for 5 p.m. ET/2 p.m. PT today to discuss the results from the fiscal first quarter 2012, ended July 1, 2011, and to review guidance. Interested parties may access the conference call on the Internet at http://www.symantec.com/invest. To listen to the live call, please go to the Web site at least 15 minutes early to register, download and install any necessary audio software. A replay and script of our officers’ remarks will be available on the investor relations’ home page shortly after the call is completed.

About Symantec

Symantec is a global leader in providing security, storage and systems management solutions to help consumers and organizations secure and manage their information-driven world. Our software and services protect against more risks at more points, more completely and efficiently, enabling confidence wherever information is used or stored. More information is available at www.symantec.com.

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NOTE TO EDITORS: If you would like additional information on Symantec Corporation and its products, please visit the Symantec News Room at http://www.symantec.com/news. All prices noted are in U.S. dollars and are valid only in the United States.

Symantec and the Symantec Logo are trademarks or registered trademarks of Symantec Corporation or its affiliates in the U.S. and other countries. Other names may be trademarks of their respective owners.

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Symantec Reports First Quarter Fiscal 2012 Results

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FORWARD-LOOKING STATEMENTS: This press release contains statements regarding our financial and business results, which may be considered forward-looking within the meaning of the U.S. federal securities laws, including projections of future revenue, earnings per share and deferred revenue, as well as projections of amortization of acquisition-related intangibles and stock-based compensation and restructuring charges. These statements are subject to known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to differ materially from results expressed or implied in this press release. Such risk factors include those related to: general economic conditions; maintaining customer and partner relationships; the anticipated growth of certain market segments, particularly with regard to security and storage; the competitive environment in the software industry; changes to operating systems and product strategy by vendors of operating systems; fluctuations in currency exchange rates; the timing and market acceptance of new product releases and upgrades; the successful development of new products and integration of acquired businesses, and the degree to which these products and businesses gain market acceptance. Actual results may differ materially from those contained in the forward-looking statements in this press release. We assume no obligation, and do not intend, to update these forward-looking statements as a result of future events or developments. Additional information concerning these and other risks factors is contained in the Risk Factors sections of our Form 10-K for the year ended April 1, 2011.

USE OF NON-GAAP FINANCIAL INFORMATION: Our results of operations have undergone significant change due to a series of acquisitions, the impact of SFAS 123(R), impairment charges and other corporate events. To help our readers understand our past financial performance and our future results, we supplement the financial results that we provide in accordance with generally accepted accounting principles, or GAAP, with non-GAAP financial measures. The method we use to produce non-GAAP results is not computed according to GAAP and may differ from the methods used by other companies. Our non-GAAP results are not meant to be considered in isolation or as a substitute for comparable GAAP measures and should be read only in conjunction with our consolidated financial statements prepared in accordance with GAAP. Our management regularly uses our supplemental non-GAAP financial measures internally to understand, manage and evaluate our business and make operating decisions. These non-GAAP measures are among the primary factors management uses in planning for and forecasting future periods. Investors are encouraged to review the reconciliation of our non-GAAP financial measures to the comparable GAAP results, which is attached to our quarterly earnings release and which can be found, along with other financial information, on the investor relations’ page of our Web site at www.symantec.com/invest.

SYMANTEC CORPORATION

Condensed Consolidated Balance Sheets

(In millions)

SYMANTEC CORPORATION

Condensed Consolidated Statements of Income

(In millions, except per share data, unaudited)

SYMANTEC CORPORATION

Condensed Consolidated Statements of Cash Flows

(In millions, unaudited)

SYMANTEC CORPORATION

Reconciliation of Selected GAAP Measures to Non-GAAP Measures ⁽¹⁾

(In millions, except per share data, unaudited)

SYMANTEC CORPORATION

Revenue and Deferred Revenue Detail ⁽¹⁾

(In millions, unaudited)

SYMANTEC CORPORATION

Operating Margin by Segment Detail ^{(1, 2)}

(Unaudited)

SYMANTEC CORPORATION

Guidance and Reconciliation of GAAP to Non-GAAP Earnings Per Share

(In billions, except per share data, unaudited)

We include certain non-GAAP measures in the tracking and forecasting of our earnings and management of our business. For a detailed explanation of these non-GAAP measures, please see our Explanation of Non-GAAP Measures in Appendix A.

SYMANTEC CORPORATION

Explanation of Non-GAAP Measures

Appendix A

The non-GAAP financial measures included in the tables adjust for the following items: business combination accounting entries, stock-based compensation expense, restructuring charges, charges related to the amortization of intangible assets and acquired product rights, impairments of assets and certain other items. We believe the presentation of these non-GAAP financial measures, when taken together with the corresponding GAAP financial measures, provides meaningful supplemental information regarding the Company’s operating performance for the reasons discussed below. Our management uses these non-GAAP financial measures in assessing the Company’s operating results, as well as when planning, forecasting and analyzing future periods. We believe that these non-GAAP financial measures also facilitate comparisons of the Company’s performance to prior periods and to our peers and that investors benefit from an understanding of these non-GAAP financial measures.

Stock-based compensation: Consists of expenses for employee stock options, restricted stock units, restricted stock awards and our employee stock purchase plan determined in accordance with the authoritative guidance on stock-based compensation. When evaluating the performance of our individual business units and developing short and long term plans, we do not consider stock-based compensation charges. Our management team is held accountable for cash-based compensation, but we believe that management is limited in its ability to project the impact of stock-based compensation and accordingly is not held accountable for its impact on our operating results. Although stock-based compensation is necessary to attract and retain quality employees, our consideration of stock-based compensation places its primary emphasis on overall shareholder dilution rather than the accounting charges associated with such grants. In addition, for comparability purposes, we believe it is useful to provide a non-GAAP financial measure that excludes stock-based compensation in order to better understand the long-term performance of our core business and to facilitate the comparison of our results to the results of our peer companies. Furthermore, unlike cash-based compensation, the value of stock-based compensation is determined using a complex formula that incorporates factors, such as market volatility, that are beyond our control.

Amortization of acquired product rights and other intangible assets: When conducting internal development of intangible assets, accounting rules require that we expense the costs as incurred. In the case of acquired businesses, however, we are required to allocate a portion of the purchase price to the accounting value assigned to intangible assets acquired and amortize this amount over the estimated useful lives of the acquired intangibles. The acquired company, in most cases, has itself previously expensed the costs incurred to develop the acquired intangible assets, and the purchase price allocated to these assets is not necessarily reflective of the cost we would incur in developing the intangible asset. We eliminate these amortization charges from our non-GAAP operating results to provide better comparability of pre and post-acquisition operating results and comparability to results of businesses utilizing internally developed intangible assets.

Restructuring and transition: We have engaged in various restructuring, transition and transformation activities over the past several years that have resulted in costs associated with severance, benefits, outplacement services and excess facilities. Each restructuring and transformation activity has been a discrete event based on a unique set of business objectives or circumstances, and each has differed from the others in terms of its operational implementation, business impact and scope. We do not engage in restructuring activities in the ordinary course of business. While our operations previously benefited from the employees and facilities covered by our various restructuring charges, these employees and facilities have benefited different parts of our business in different ways, and the amount of these charges has varied significantly from period to period. We believe that it is important to understand these charges and, we believe that investors benefit from excluding these charges from our operating results to facilitate a more meaningful evaluation of current operating performance and comparisons to past operating performance.

Impairment of goodwill: Due to the adoption of new authoritative accounting guidance at the beginning of our fiscal year 2012, we were required to perform a Step 2 goodwill impairment test for our Services reporting segment. As a result for the three months ended July 1, 2011, we recognized an impairment loss of $19 million which reduced the carrying value of goodwill reported in the Services reporting segment. We do not believe that this charge is indicative of future operating results. We believe that investors benefit from excluding this charge from our operating results to facilitate a more meaningful evaluation of current operating performance and comparisons to past operating performance.

Acquisition related expenses: The authoritative guidance on business combinations requires us to record in the statement of income, certain items that at the time of an acquisition would have been recorded to goodwill under the old authoritative guidance. We have excluded the effect of acquisition-related expenses from our non-GAAP operating expenses and net income measures. We incurred expenses in connection with our acquisitions, which we generally would not have otherwise incurred in the periods presented as a part of our continuing operations. Acquisition-related expenses consist of professional service expenses. We believe it is useful for investors to understand the effects of these items on our operations. Although acquisition-related expenses generally diminish over time with respect to past acquisitions, we generally will incur these expenses in connection with any future acquisitions.

SYMANTEC CORPORATION

Explanation of Non-GAAP Measures

Appendix A (continued)

Non-cash interest expense: Effective April 4, 2009, we adopted authoritative guidance on convertible debt instruments, which changes the method of accounting for our convertible notes. Under this authoritative guidance, our EPS and net income calculated in accordance with GAAP have been reduced as a result of recognizing incremental non-cash interest expense. We believe it is useful to provide a non-GAAP financial measure that excludes this incremental non-cash interest expense in order to better understand the long-term performance of our core business and to facilitate the comparison of our results to the results of our peer companies.

Joint venture: As noted above, we exclude amortization of other intangible assets related to the joint venture from our non-GAAP net income.

Release of pre-acquisition tax contingencies: On December 10, 2009, the U.S. Tax Court issued its opinion on the Veritas Software tax assessment for 2000 and 2001, finding that our transfer pricing methodology, with appropriate adjustments, was the best method for assessing the value of the transaction at issue between Veritas and its offshore subsidiary. Our evaluation of the U.S. Tax Court’s ruling necessitated the release of certain tax accruals related to this matter during the three months ended January 1, 2010. In June 2010, we reached an agreement with the IRS concerning the amount of the adjustment from the favorable U.S. Tax Court decision issued. Accordingly, we further reduced our previous accrual related to this matter to reflect the tax liability arising from this agreement and we realized a one-time benefit to GAAP net income of $38.5 million and a non-GAAP one-time benefit of $7.3 million for the three months ended July 2, 2010. The non-GAAP benefit for this period is due to the reversal of accrued interest attributed to the Veritas tax assessment that was recorded to our income statement during post-acquisition periods. Accordingly, the amount of these accruals has not been excluded from Symantec’s non-GAAP results.