sadly you’re at a rock and hard place moment. while 7 is subpar (at times unusable) any bugs in 6 will be permanent bugs and won’t, no matter how we beg, be fixed (outside, perhaps a security flaw in 6 before 7 is finished being retooled though both those concept, 7 being majorly retooled and 6 having secflaws repaired, are highly unlikely).
I have never understood quite why CCleaner felt it necessary to include the Windows Updates in the Software Updater?
If your machine needs a particular Windows Update then Windows itself will give it to you.
(Unless there is something wrong with your Windows updater, and CCleaner couldn’t fix that anyway).