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 from the current operating system's installation media 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. At the command prompt, type the following commands, pressing ENTER after each command:

   <CD-ROM drive letter>:
   

   Where <CD-ROM drive letter> is the drive letter of your CD-ROM drive

   
   setup.exe
   

   Follow the instructions on the screen to complete Setup.

   
   NOTE: If you do not have access to your CD-ROM drive from the command prompt, please see the following article in the Microsoft Knowledge Base:

   Q135174 Cannot Access CD-ROM Drive from MS-DOS Mode or Command Prompt

Damaged Installation Media

Additional query words: 98

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