my pc's been behaving strange after a virus infection. I've used multiple antivirus software, each of which detected different threats and, hopefully, removed them. After multiple full scans, startup scans and whatnot the issue is still going and nothing detects the threat.
so the worst problems are:
-CPU usage going crazy only when connected to internet, forming a "diamond" formation. i'll attach an image here.
-pc slowing down only when connected to internet. Probably related to the CPU issue.
-long black screen before windows startup
-RAM usage higher than it should be
-other strange random behaviors
do i have to factory reset to resolve the issue? is it (at least) highly likely to work? i want to avoid this option if possible. Thanks.