Found a kuang2 file in pc off internet for the past 3 years.

Hello, I always had strong intrusion problems with all my systems surfing in the net, mainly with trojans. Always used firewall, antivirus, anti-malware, non-signature anti-malware and they found nothing but I was finding and erasing trojans with online downloaded scanners such as Adaware, Spyware doctor etc. In 2009 I disconnected my desktop with lots of problems, remote shut down, calendar date and time randomly changing, vertical bars of browsers, notepad and wordpad dancing up and down stopping me from writing and reading etc. I kept it off-line since then and incidentally, the calendar stopped to change randomly immediately and up to now works all right. Now I scanned with a 2010 antivirus, and found among other things I erased, a kuang2 file in system volume information folder. I hesitated to erase cause the antivirus instruction manual says if something erased destabilizes windows maybe 'll have to reinstall them. Did not know if system volume information folder is part of the operating system of windows and searched a little in the net where I found https://www-secure.symantec.com/norton-support/jsp/help-solutions.jsp?docid=20080421114858EN&lg=english&ct=united+states&product=home&version=1&pvid=f-home&entsrc=redirect_pubweb. I believe I read before that, IF YOU CANNOT DELETE A VIRUS , FROM SYSTEM VOLUME INFORMATION FOLDER then follow instructions as follows. So my question is should I first take the option “delete” of my antivirus (it proposes only two, erase and locate) and see what happens, or go straight to shutting down and reopening system restore? Is it possible to destabilize windows or corrupt whole system volume information folder if I erase infected file with antivirus? I asked the antivirus support but they never answered to me. I consider that shutting down and reopening the system restore will result to not being able to undo this, if anything goes wrong… Tks for any answer asap