We're currently running a number of virtual servers on Dell R610s; these include Windows server 2003, 2008 32bit, 64bit and R2. We seem to be having a problem with the 2008 R2 servers. The performance of them seems to degrade over time causing high CPU usage and a slow response from the GUI. The other servers run fine it's just the R2 servers that we're having problems with for instance I’ll go to 'Start' > 'Administrative Tools' and it will take an age for it to display whilst the explorer.exe process almost hits 100% of CPU. I've rebuilt some servers but it seems that the problem still persists. Any help would be much appreciated as I'm at my wits end.

what nic driver are you using? http://www.intel.com/support/motherboards/server/sb/CS-031086.htm

Hi, Please also help confirm the following: · Are you using Hyper-V? · What operating system is running on the Parent Partition? Windows Server 2008 R2? · Is the Windows Server 2008 R2 virtual machine clean installed? · Do you encounter the issue when you only run one Windows Server 2008 R2 virtual machine on the physical machine? Meanwhile, please check if the following hotfix can resolve the issue: 976417 High CPU usage in the Explorer.exe process when you open a folder that contains corrupted .wav files in Windows 7 or in Windows Server 2008 R2 http://support.microsoft.com/default.aspx?scid=kb;EN-US;976417This posting is provided "AS IS" with no warranties, and confers no rights. Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, How are you? Is there any update on the issue? If there is anything unclear, please do not hesitate to respond back. Thanks.This posting is provided "AS IS" with no warranties, and confers no rights. Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.