I was trying to incorporate the latest SP1 onto my Vista Ultimate x86 drive via Virtual PC and kept coming up with 800F081F error. It happend right after it started to download SP1, got to about 13% downloaded, and then say this error. I tried several times. Made numerous different vLite'd disks with different settings but the same thing. It was not until just a minute ago that I released this: Since Bitlocker is required and that it's not "on" in my Virtual drive, that I kept coming up with this error. Also, the code resembles the one listed on this site. So, I'm going to go burn my image to a DVD and install on another parition on my HDD. Hopefully everything goes well and I can get this stupid thing to work.. :/ BTW, I'm loving SP1 on Vista Ultimate x64 (build 6001.17036, non-vLite'd). -Mike