An aside. Never install Norton 360. I thought I would try it. Big mistake.
I use Windows 7 Pro. It took 4 attempts to get it installed.
5 bluescreens in 8 days. 2 just today. Had not had any prior for years.
I uninstalled using Norton’s own uninstallerand restarted ok. I installed the past anti virus program I used called Webroot and restarted. It got stuck at the Welcome screen just after the log in.
The fix was running chkdsk /f /r
Just the opposite here. I run Norton 360, MalwareBytes Premium and CCleaner on both my 2009 HP Compaq 6000 Pro Microtower (Win-7 Pro x64), and they perform flawlessly. Never had a BSoD, or virus, ever. And have had Norton for MANY years.