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Error Message: Your Computer Already Has an Operating System Installed, Which Cannot Be Upgraded by This Version of Setup
Article ID: 225252 - View products that this article applies to.
This article was previously published under Q225252
When you try to upgrade your Microsoft Windows 95-based computer to Windows 98, you may receive the following error message:
This issue can also occur if you try to upgrade with a full version. Before troubleshooting, ensure CD-ROM installation is Upgrade version.
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 occur for either of the following reasons:
To resolve this issue:
Damaged Installation MediaIf 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.