Your computer repeatedly restarts


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Microsoft Knowledge Base Article - 878474

http://support.microsoft.com/default.aspx?...kb;en-us;878474

Your computer repeatedly restarts after you install Windows XP Service Pack 2

View products that this article applies to.

SYMPTOMS

After you install Microsoft Windows XP Service Pack 2 (SP2), your computer repeatedly restarts. You do not receive an error message.

CAUSE

This issue occurs if all the following conditions are true:

You install the 32-bit version of Windows XP SP2 on a computer that has an AMD 64-bit processor.

You configure your computer to enforce data execution prevention (DEP). DEP is also known as no-execute protection.

You installed hardware that requires the Mpegport.sys driver.

When you restart your computer after you install Windows XP SP2, the Mpegport.sys driver tries to write data to a memory location that is monitored by DEP. This behavior causes the computer to restart.

RESOLUTION

You may be able to resolve this issue if you configure a DEP exception. To do this, follow these steps:

Click Start, click Run, type Sysdm.cpl, and then click OK.

On the Advanced tab under Performance, click Settings.

On the Data Execution Prevention tab, click Hardware and software DEP enabled for all programs except.

Click Add, type the path of the Mpegport.sys file on your hard disk, and then click OK two times.

WORKAROUND

To work around this issue, remove Windows XP SP2 from your computer. To do this, follow these steps:

Restart your computer.

Press the F8 key. On a computer that is configured to start to multiple operating systems, press F8 when the Startup menu appears.

Use the arrow keys to select a safe mode option, and then press ENTER.

Click Start, click Run, type Appwiz.cpl, and then click OK.

In the list of installed programs, click Windows XP Service Pack 2, and then click Remove.

Follow the instruction on the screen to remove Windows XP SP2 from your computer.

MORE INFORMATION

This issue is known to occur if the Sigma Designs Hollywood Plus DVD decoder is installed on your computer.

For more information about data execution prevention, visit the following Microsoft Web sites:

Changes to Functionality in Microsoft Windows XP Service Pack 2 - Part 3: Memory Protection Technologies

http://www.microsoft.com/technet/prodtechn...n/sp2mempr.mspx

/noexecute

http://msdn.microsoft.com/library/default....a392de2.xml.asp

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

The information in this article applies to:

Microsoft Windows XP Home Edition Service Pack 2 (SP2)

Microsoft Windows XP Professional Service Pack 2 (SP2)

Microsoft Windows XP Tablet PC Edition Service Pack 2 (SP2)

Microsoft Windows XP Media Center Edition Service Pack 2 (SP2)

Last Reviewed: 8/18/2004 (2.0)

Keywords: kbtshoot kbprb KB878474 kbAudEndUser kbAudITPRO

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