If you are able to power up the VM and the virtual disks are not shared (e.g. MSCS), then it's most likely a guest OS issue you see. Please provide some further details about the VM in question. Did the guest work previously? Are you able to access the drive properties as the local administrator? How does the disk show up in the Windows Disk Manager?
Shows up in DM ok, just can't access it. Shows as zero size. I haven't seen this before so just wondered if it's anything to do with the ESXi side - just wanted to eliminate it as a suspect. We've had the host powered down and restarted a few times previously without issue, this vm came up each time no problem.
Did you try removing the vmdk (not deleting)and adding it back.
Also check if the disk is online in windows.
Looks like a W2008 UAC issue. Finally having had time to search on it, it seems fairly common.
I have same issue and i had talk with vmware support according to them log ticket with Microsoft as this is OS side issue..
We are struggling with the same issue, tried all possibilities but seem no use.