This article was previously published under Q326683
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When you install or upgrade to Microsoft Windows XP, the system partition may be assigned a drive letter other than the one that you expect. For example, the system partition may be assigned a drive letter other than C.
The system partition contains the Ntldr, Boot.ini, and Ntdetect.com files.
This problem may occur if a Zip drive is connected to the computer when you install Windows XP. The problem occurs when the computer detects the Zip drive as a hard disk.
To resolve this problem, disconnect the Zip drive from the computer. Then, reinstall Windows XP.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about system partitions and boot partitions, click the following article number to view the article in the Microsoft Knowledge Base:
314470 Definition of system partition and boot partition