To remove XenTools from VMs if standard uninstall does not work.

Instructions

Complete the following steps:

1. Create a snapshot of the working VM if possible.

2. Use msconfig to disable all non-Microsoft and Citrix processes.

3. Reboot the VM.

4. Uninstall XenTools, guest agent, drivers and all individual drivers msi through Add/Remove programs. (guest agent first, then PV tools, then each individual driver msi in any order).

5. Cut and paste system32/drivers/xen*.sys to a backup folder of your choice.

6. Back up the Registry.

7. Remove xenfilt from the upperfilters registry entries.
   
   Note: Check all of them. Example o HKLM\SYSTEM\CurrentControlSet\Control\Class{4d36e96a-e325-11ce-bfc1-00802be10318 o HKLM\SYSTEM\CurrentControlSet\Control\Class{4d36e97d-e325-11ce-bfc1-00802be10318 o HKLM\SYSTEM\CurrentControlSet\Control\Class{…

8. Reboot the VM

9. Install XenTools and reboot as many times as needed.

10. Use Msconfig to set to normal start up and reboot the VM.