I have 27 2008R2 servers (all Hyper-V guests) that recently started running fast. There are other 2008R2 servers on the same hosts that run spot on. The time averages from 2 to 3 minutes fast but at times has gotten to as much as 20 minutes. If I run w32tm /striptchart against the master clock server I can see the time change very quickly, as much a second faster every second. It varies sometimes it is slower. I can run w32tm /resync and see the time go back to correct but it quickly starts to drift again. I do not think it is a sync issue but rather the clock actually running fast. Thank you for any help.