I recently installed a Windows 2008 R2 server with IIS and file sharing. Very basic setup. However, I keep getting the following in the event log. "Volume Shadow Copy Service error: Unexpected error calling routine RegOpenKeyExW(-2147483646,SYSTEM\CurrentControlSet\Services\VSS\Diag,...). hr = 0x80070005, Access is denied." How do I correct this issue? Thanks in advance.

run chkdsk /f to make sure the disk file system is ok are you using a tool to synchronize files? Windows MVP, XP, Vista, 7. Expanding into Windows Server 2008 R2, SQL Server, SharePoint etc. I feel badly for my American friends who have to endure the extremists in Washington who are bankrupting the nation over ideology. My page on Video Card Problems is now my most popular landing page. See my gaming site for game reviews etc. Developer | Windows IT | Chess | Economics | Hardcore Games | Vegan Advocate | PC Reviews

Thank you for the response. I ran the chkdsk and here is the results. It looks like there were an error with "free space marked as allocated". Would that cause this? I am not using any synchronizing tools for files. A disk check has been scheduled. Windows will now check the disk. CHKDSK is verifying files (stage 1 of 3)... 156160 file records processed. File verification completed. 144 large file records processed. 0 bad file records processed. 0 EA records processed. 60 reparse records processed. CHKDSK is verifying indexes (stage 2 of 3)... 207732 index entries processed. Index verification completed. 0 unindexed files scanned. 0 unindexed files recovered. CHKDSK is verifying security descriptors (stage 3 of 3)... 156160 file SDs/SIDs processed. Cleaning up 318 unused index entries from index $SII of file 0x9. Cleaning up 318 unused index entries from index $SDH of file 0x9. Cleaning up 318 unused security descriptors. Security descriptor verification completed. 25787 data files processed. CHKDSK is verifying Usn Journal... 7111040 USN bytes processed. Usn Journal verification completed. CHKDSK discovered free space marked as allocated in the volume bitmap. Windows has made corrections to the file system. 102398309 KB total disk space. 30536556 KB in 116952 files. 88988 KB in 25788 indexes. 0 KB in bad sectors. 233413 KB in use by the system. 65536 KB occupied by the log file. 71539352 KB available on disk. 4096 bytes in each allocation unit. 25599577 total allocation units on disk. 17884838 allocation units available on disk. thanks.

Well, I guess that was not it. It is still occurring.

Are you attempting to copy running VMs? Windows MVP, XP, Vista, 7. Expanding into Windows Server 2008 R2, SQL Server, SharePoint etc. I feel badly for my American friends who have to endure the extremists in Washington who are bankrupting the nation over ideology. My page on Video Card Problems is now my most popular landing page. See my gaming site for game reviews etc. Developer | Windows IT | Chess | Economics | Hardcore Games | Vegan Advocate | PC Reviews

No, in fact I did not even have Hyper-V installed until late yesterday as my managment is pushing me to complete the installation. I was seeing this problem a couple days before that.

Maybe you need to find a different server to use Hyper-V and then use a VM to explore options in a safe sandbox Make sure any server you use has tons of RAM as each VM can use a lot depending on the workload Windows MVP, XP, Vista, 7. Expanding into Windows Server 2008 R2, SQL Server, SharePoint etc. I feel badly for my American friends who have to endure the extremists in Washington who are bankrupting the nation over ideology. My page on Video Card Problems is now my most popular landing page. See my gaming site for game reviews etc. Developer | Windows IT | Chess | Economics | Hardcore Games | Vegan Advocate | PC Reviews

Understand, but any other ideas on the VSS issue? It has nothing to do with VMs as it was happening way before I instaled Hyper-V? Thanks,

Hi, According to the error message, it seems that you have no permission on the registry “SYSTEM\CurrentControlSet\Services\VSS\Diag,...”. Based on the current situation, please try to navigate to the problematic registry, right click on it and select Permissions to modify the permissions. Regards,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.

Thanks, I made the permisions change. I am assuming since Network Service is what the service is logged on as, that is "who" I need to give permission to. Is that correct? I am monitoring it now.

That was it. I gave the permission to the account that is running the service and it stopped the error. Thanks,