I just did a repair install and am experiencing freezes since. I used step 4, using the downloaded .iso from Dell forums. Every few hours the computer will lock up. It's not a BSOD, just the last frame on the screen sticks and of course all functionality goes away (no mouse/keyboard, plugging in new USB devices doesn't register, etc). Speakers will make that infamous "buzzing sound" if audio was playing as it froze.
I had this problem in the past, as described here: Locking up computer - CPU Vcore experiencing massive fluctuation(33%)
I've re-installed all drivers, used CCleaner, and checked the UEFI to make sure all the previous settings went unchanged.
I've also reset the CPU to clock speeds and still experienced the same freezes.
Would a full format be suitable in this case? I've also created a backup image of the previously working setup using DriveImageXML. Another course of action would be restoring it, keeping in mind I'll need to re-install Windows somehow inevitably to fix the issues I had in the first place.
What is the best course of action here?