Take a look at this Microsoft article about Volume Shadow Service:
http://technet.microsoft.com/en-us/library/cc734545(WS.10).aspxThis article is about Server 2008, and I do not have this service running on my Windows 7 Pro 64-bit machines. Are you using RAID drives? or some other multi-drive setup to cause this?
I agree that Windows 7 should start up in a minute or two. 10 minutes is way too long. Take a look a msconfig to see if you can start in a reduced service mode and then add one by one until you see the offending service and if it needs to be running. I also agree with checking for malware.
... Thinkpads_User