Thanks, I really could have used that WSUS only yesterday!
A friend of mine has an R61 with a 1TB hard disk, and originally W7-Pro 32-bit installed.
He's a DJ in his spare time, using that R61, so got a lot of music on that HD as well!
About 67'000 songs (~350GB), luckily he stored them on a separate partition!
And then one day W10 came along, without him paying attention and literally destroyed his W7-OS!
The 50
GB W7-partition contained less than 300
MB W10-data when he brought it to me to "fix" that blasted W10 Repair-loop!
That HD also still had the recovery partition on it, but that became rather moot when you look at the amount of music!
So, rather than run Recovery, which would destroy all that music, I installed W7/SP1 64-bit (from T420 recovery disks) on a different HD.
When done, I removed all the Lenovo bloatware.
Then I did all those 177 Windows updates, which took bleedin' ages!
That's where the above
WSUS would have come in really handy!
Anyway, after finishing all the Windows updates, I took
Acronis images of the System, OS and Recovery partitions of that new HD.
Then I 'restored' only the (64-bit) System and OS partitions back onto the R61 HD, thus replacing the damaged W10-junk.
(I left the original 32-bit recovery partition untouched so far).
Upon booting for the first time, Thinkvantage Recovery came on, frightened me at first, but only did an automatic Startup-repair.
(I guess to combine/link the System and OS partitions that came from a different drive).
Took about 30 seconds, then rebooted, this time into W7, yeah!
Wonder what would have happened, had I deleted that recovery partition...
Anyway, all done now!