It's a fair question, but I've never intentionally used a reg cleaner or "system optimizer". I did reluctantly run Tweaking's All-In-One Repair, but I only selected the Windows Update repair. I've had mixed results with that utility, but more successes than failures.
I ran the fixlist, rebooted, and ran Windows Update. 2 of 10 installed successfully. I rebooted and tried again (I know, this isn't what you asked me to do, my apologies for going off book). This time only 7 were available. Those also failed, and I got one of the 'Reverting Changes made by Windows Updates' reboot cycles. The desktop is finally loading after a few reboots. I'll send the requested logs in a next post, from that machine.