Please note that this patch will not resolve issues associated with any other versions of Windows 95 other than the OEM SR2 version. If you have any other version other than OEM SR2, please contact technical support for further options available to you. To determine the version that you have on your system, please read below.

If you are not sure which version of Windows 95 you have, you can find out simply by checking your System Properties. To do this, right mouse click on "My Computer" and select "Properties". An OEM SR2 system will show a designator, such as "4.00.9500 B" or "4.00.9500 C" as the version. The number may vary slightly, but the letter designator will be a "B" or a "C" for the OSR2 version. Version designators without a "B" or a "C", such as an "A" or nothing after the number, cannot utilize this patch. For these versions, please contact technical support for further assistance to resolve this issue.

Problem(s) this Update Resolves

When you are starting Windows 95 OSR2, OSR2.1, or OSR2.5 on a computer with an AMD-K6-2 processor running at speeds of 350 MHz and above, you may receive one of the following error messages:

• Device IOS failed to initialize.
• Windows Protection Error.
• You must reboot your computer.

This observation is caused by a software timing loop that is sensitive to processor frequency, and is not a processor erratum. This DOES NOT occur with Windows 98 or Windows NT®. AMD has worked closely with Microsoft to enable a publicly available solution which is available below.

This problem is very intermittent at 350MHz. Note that it is necessary to reboot the computer after the error occurs. If the error does not occur, the system will run normally.

Microsoft Knowledge Base reference article(s): Q192841 AMD K6-2/350 CPU Windows Protection Error at boot time.

How to Install

1. If you agree with the Software Usage Terms set forth below, please press the "Accept" button to begin the download process. If you do not agree with the Software Usage Terms, press the "Decline" button.
2. Copy the file AMDK6UPD.EXE into an empty folder, and run AMDK6UPD.EXE to install the update.
3. You may be warned that you are about to replace a newer file with an older version of the file. Generally, you should the keep the newer file, and choose not to replace it with an older file.
4. Restart the computer for the changes to take effect.

How to Uninstall

1. Using Windows Explorer, locate the file AMDK6_UN.INF in the Windows\INF\QFE folder, right-click on the file AMDK6_UN.INF, and choose Install.
2. You will be prompted for the Windows 95 installation CD or diskettes. Choose the appropriate path.
3. You may beprompted to replace the newer file with an older version of the file. To uninstall this update, choose to Replace the newer file.
4. Restart the computer for the changes to take effect.