Possible virus on Jaywalker

Jaywalker computer started acting weird yesterday.  I may have clicked a link in an email and gotten a virus that way.  Symptoms:
Won't shutdown - shutdown screen just hangs
Devices and Printers screen is blank
Control panel screen is blank
runs slow
would not print from notepad

Found a guide for how to remove viruses on wikiHOW and it said to boot into safemode with networking and then to download Malwarebytes.  I did that and did a scan with Malwarebytes (all the time still in safemode with networking) and it did not detect any problems.  But after that everything seemed to work.  So I don't know what happened.  Once I was in safemode, I was able to bring up control panel and devices and printers screen; maybe that somehow "fixed" it.