Err Msg: Your Computer Already Has an Operating System...

• Microsoft Windows 98

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.

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, run Windows 98 Setup from MS-DOS mode:

1. Click Start, click Shutdown, click Restart the computer in MS-DOS mode, and then click OK.



2. At the command prompt, type the following commands, pressing ENTER after each command:

   cd 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 to the Windows\System folder. For information about how to extract files, please see the following article in the Microsoft Knowledge Base:

   Q129605 How to Extract Original Compressed Windows Files




3. Restart your computer, and then run Setup again. If this does not resolve the issue, verify that your installation media is not damaged, and if it is, replace it.

Additional query words: 98

Keywords          : kbenv kberrmsg kbsetup win98 
Version           : WINDOWS:
Platform          : WINDOWS 
Issue type        : kbprb 

Last Reviewed: May 19, 1999