I have recently been setting up AppSense Suite 8.3.

When I deployed the agent from the console to a Windows 7 VDI running on XenServer 6 it would Blue Screen, reboot, the agent would try to install again and then it would Blue Screen again.

I set the machine to complete memory dump and analysed the memory.dmp.

WinDbg was telling me that the cause of the Blue Screen was XENUTIL.SYS ( XENUTIL!__XenLog+ac )

Googleing this led me to this Citrix article.

Sure enough, adding the registry keys allowed me to install the Appsense agents without the Blue Screen occuring.