Article ID: 329832
After you install Windows XP Service Pack 1 (SP1) on a Panasonic Toughbook Light CF-R1P Series or Panasonic Toughbook CF-M34N Series portable computer that uses the Intel 440MX chipset, you may receive a STOP error message similar to the following on a blue screen:
NOTE: The parameter values may be different on your computer, but a memory dump analysis indicates that the error message is based in Stac97.sys.
STOP 0x00000050 (parameter1, parameter2, parameter3, parameter4)
After you receive the error message, the computer may automatically restart. You may find that you can restart the computer only in Safe mode.
This issue may occur if both of the following conditions are true:
To resolve this issue, start the computer in Safe mode, and then update the Intel audio codec driver for the SigmaTel audio codec to the latest version. To do this, follow these steps:
To prevent this issue from occurring, update the Intel audio codec driver for the SigmaTel audio codec before you install Windows XP SP1. To update the audio codec driver, follow step 2 in the "Resolution" section of this article.
For additional information about Safe mode startup options in Windows XP, click the article number below to view the article in the Microsoft Knowledge Base:
315222For additional information about how to manage devices using Device Manager, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/315222/EN-US/ )A Description of the Safe Mode Boot Options in Windows XP
283658The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
(http://support.microsoft.com/kb/283658/EN-US/ )How to Manage Devices in Windows XP