Microsoft KB Archive/225252

= Error Message: Your Computer Already Has an Operating System Installed, Which Cannot Be Upgraded by This Version of Setup =

Article ID: 225252

Article Last Modified on 1/24/2007

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APPLIES TO


 * Microsoft Windows 98 Standard Edition

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This article was previously published under Q225252



SYMPTOMS
When you try to upgrade your Microsoft Windows 95-based computer to Windows 98, you may receive the following error message:

Warning SU0168

Your computer already has an operating system installed, which cannot be upgraded by this version of Setup. Please obtain the Windows 98 Upgrade.

This issue can also occur if you try to upgrade with a full version. Before troubleshooting, ensure CD-ROM installation is Upgrade version.



CAUSE
This issue can occur for either of the following reasons:
 * An incorrect version of the Setupx.dll file is currently loaded into memory.
 * Your installation media (CD-ROM or floppy disk) may be damaged.



RESOLUTION
To resolve this issue:  Click Start, click Shutdown, click Restart the computer in MS-DOS mode, and then click OK. At the command prompt, type the following commands, pressing ENTER after each command:

cd windows\system

ren setupx.dll setupx.ol1

ren setupx.w95 setupx.ol2

NOTE: If the Setupx.w95 file is missing, extract a new copy of the Setupx.dll file from the current operating system's installation media to the Windows\System folder. For additional information about how to extract files, click the article number below to view the article in the Microsoft Knowledge Base:

129605 How to Extract Original Compressed Windows Files

 Type exit, and then press ENTER. Click Start, click Run, type :\win98\setup.exe, and then click OK.

Damaged Installation Media
If you suspect that your installation media is damaged, contact the Microsoft Order Desk at 800-360-7561 Monday-Friday, 5:00 A.M. to 7:00 P.M. PST.

Keywords: kbenv kberrmsg kbprb kbsetup KB225252

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