Jul 25, 2011 10:25 GMT  ·  By

It appears that some of the customers leveraging XP Mode and Windows Virtual PC on Windows 7 have started coming across issues after they upgraded to Service Pack 1.

A member of the Microsoft Reduce Customer Effort Center confirmed the problem and also offered guidance on how affected customers can deal with the glitch.

“After you install Windows 7 SP1, you may receive the message that the XP Mode needs to be Upgraded (Upgrading Virtual PC Integration Components) when you open the XP Mode,” the software giant stated.

In certain cases, Windows 7 users find that they’re not able to upgrade the Virtual PC Integration Components. Microsoft revealed that the upgrade process fails with the following error message "Setup Interrupted" being displayed to customers.

The Redmond company is pointing customers experiencing the issue describe above to analyze setupact.log and vmguestsetup.log. It seems that wdf01000.sys and wdfldr.sys can be associated with the source of the problem causing Virtual PC Integration Components upgrades to fail.

Here are seven steps detailed by Microsoft that customers can follow in an attempt to resolve the issue:

“1. Unistall Virtual PC Components.

2. Remove the device that is unrecognized from the device manager

3. Rename the following 2 files

C:\WINDOWS\system32\DRIVERS\wdf01000.sys and

C:\WINDOWS\system32\DRIVERS\wdfldr.sys

4. Restart the system. Hardware wizard comes up at reboot. Some inf file is left over, so it recognizes it as the bus thing, but needs a file in the Program files\Virtual PC ... folder (which is gone). Dismiss the dialog.

5. Install the Integration components.

6. When the hardware wizard comes, select to manually to install, enter the path in the first option - C:\Program Files\Virtual PC Integration Components and click next. It should recognize the unrecognized device

7. Restart and enable the Integration features.”

XP Mode is a free, virtualized copy of Windows XP SP3 which Microsoft started providing to Windows 7 users back in late 2009 in order to help them deal with legacy applications compatibility issues.

Windows 7 SP1 RTM and Windows Server 2008 R2 SP1 RTM are available for download here.

Windows XP Mode RTM and Windows Virtual PC RTM are available for download here.