On my Windows Server 2008 R2 w. the Hyper-V role, I have these guest VMs:
- 3 x Windows Server 2008 R2
- 2 x Windows Server 2003 x86
- 2 x Windows 7 x64
- 1 x Windows XP Pro x86
In general, all machines are very fast and responsive. However, the Windows XP Pro guest is very sluggish. It can take up to 2 minutes to connect to the console/or a RD session. Sometimes it can "go into sleep" for several minutes. I have tried to add a 2nd CPU and more memory, but it doesn't help. When the issue happens, it's more or less impossible to get a responsive Task Manager up to analyze which process is hogging the CPU. But I have noticed that it can be various processes; lsass.exe, crss.exe etc.
Integration Services is installed. Microsoft Security Essentials is installed, but I have tried without it, no difference.