I assume the MaxSecure detection is a false positive, as none of the better known brands detected anything amiss.
https://www.virustotal.com/gui/file/0d1dd0ce7ac930abf5104d094aa1148c3920f993a6c90bedd1790c2ec7b37d29
You may have already tried, but is worth a whirl prior to going with a clean install.
Dism.exe /online /Cleanup-Image /StartComponentCleanup /ResetBase
Toying with a fanless case for my PN50 4500U and appears there are two offerings that could be of interest, anyone done it and is it simple enough for a ham fisted oaf...
As per others have posted; Windows Defender is fine for the vast majority of home users, keep system updated, make regular backups, stay away from cracked software and you're pretty much good. Perhaps tinker with DNS, Quad9 being my choice but YMMV.
I had similar on four or five occasions last week in early hours of the morning UK.
Random 40% - 50% CPU with fans for no apparent reason, I put it down to MS running maintenance of some description and have had no repeat in last couple of days. Latest Edge stable, Win 11 Pro up to date.
New...