During upgrade to XP receive blocking message

[Guest]

Other Operating Systems Found
You cannot upgrade this Windows installation to Windows XP, because you have
more than one operating system installed on your computer. Upgrading one
operating system can cause problems with files shared by the other operating
system, and is therefore not permitted.

Have previously used same copy of XP (retail upgrade) on same computer to
upgrade OS. After a few problems decided to roll back to previous OS and try
again - now receive the above message.

All help gratefully received

 

[Carey Frisch [MVP]]

You receive an "Other Operating System found" error message
when you try to upgrade to Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;883392

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User

Be Smart! Protect Your PC!
http://www.microsoft.com/athome/security/protect/default.aspx

----------------------------------------------------------------------------

:

| Other Operating Systems Found
| You cannot upgrade this Windows installation to Windows XP, because you have
| more than one operating system installed on your computer. Upgrading one
| operating system can cause problems with files shared by the other operating
| system, and is therefore not permitted.
|
| Have previously used same copy of XP (retail upgrade) on same computer to
| upgrade OS. After a few problems decided to roll back to previous OS and try
| again - now receive the above message.
|
| All help gratefully received

 

[Guest]

Have tried the step there, but still no success.

Could it be registry settings?