Angels have the Phone Box
Yeah, alot of your errors were for VB. That's great news that you got it upgraded again!
Yes, once W10 is installed and activated on a machine, it can be clean installed as often as you like/need.
To be honest, I have seen the most problems with W7 upgrades; more so than with W8 upgrades. All problems, though, have been completely fixed by a clean install. Of course, this means reinstalling all your programs...transferring your data...but, in the end, you get a super-stable, well-oiled machine! Think about it.