Article ID: 134708 - View products that this article applies to.
This article was previously published under Q134708
When you are installing Windows 95, you may receive one of the following error messages the first time Setup restarts your computer:
- Missing Operating System
When you receive one of these error messages, the computer no longer boots from the hard disk.
- Invalid System Disk
There is an incorrect value in the Partition Boot Record (PBR) on the hard disk. Any computer with a mis-match in the number of read/write heads reported by the Partition Boot Record and the system BIOS will likely have this problem.
If there is a mismatch in the reported number of read/write heads, the C:\Setuplog.txt file contains unequal numbers on the following line:
FSLog: BIOS Heads=:64:, BootPart Heads=:64:
To correct this problem, follow these steps:
This issue is known to occur on Leading Edge Fortiva 5000 computers. The PBR on Leading Edge Fortiva 5000 computers returns a hexadecimal value of 40 heads. The actual value is 20.
For additional information about the "Invalid system disk" error message, see the following article in the Microsoft Knowledge Base:
Error Message "Invalid System Disk" After Setup Reboots
Article ID: 134708 - Last Review: November 15, 2006 - Revision: 1.1
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.