Yeah, I should “Belarc it” and I’ll bet that Belarc will say the CPU isn’t much. It tends to get tied up worse than the lowly (these days) 8 GB of RAM! (According to Task Manager.)
Nonetheless, the main “thing” here is the weird, apparently permanent reassignment of the Micro-SD drive, that I did not do. It just seemed very odd.
I would do, first, "sfc /scannow" and "dism /online /cleanup-image /restorehealth", both from a terminal with admin privileges.
Scour for nasties with malwarebytes free, and adwcleaner.
Then try an "in place upgrade" to whatever your current version of Windows is, to clear it's silly head. (You basically run setup.exe off the install stick for the version of windows you're currently running. The equivalent of the old time "repair install".) All existing apps and settings are preserved.