My challenge for the weekend...

Windows update fucked up? By that you mean Fall update?
WOW!! great job MS, great job!

I've come to the conclusion the hard disk is partially corrupted. Luckily I managed to access most of the data after chkdsk /f so I've made a backup for when the new drive comes.

I never really do OS stuff so it's going to be interesting to do a fresh Windows install.