Have you got an antivirus and firewall installed as you only mentioned siteadvisor? What browser are you using? In IE you should have an green tab top right. My firefox shows it bottom left. Firefox needs to activate it as an addon.
That said what do you mean blocked ? Are you saying a virus has stopped your access to folders?
Best to download and run the following
2 getsusp (both these need redownloading as they do not auto update)
Add yur email in the getsusp preferences.
3 Run malwarebytes.
Then see what /how the pc goes.
I currently have an AV and would like to know what is the difference of having Malwarebytes?
Malwarebytes looksat different types of infections. It can have higher false detections as it is quite severe on detections so I hear. I recommend it as a 2nd opinion to Mcafee
· ...from one of the lead developers of MalwareBytes (Bruce Harrison) :
As far as why MBAMis very good at dealing with fake AV infections, that is simple.MBAM is designed to be very good at dealing with malware that the AVs seem tobe having problems with. I do not spend my time making MBAM detect millions of infections that any decent AV already detects as MBAM is DESIGNED to work alongside antivirus software, not replace it. A huge chunk of the research that goes into MBAM revolves around what we see making it into HiJackThis HJT threads as the vast majority of these threads involve antivirus software that was in some waybypassed.
Lets settle this now and avoid any further misinformation. MBAM is now a very good backup to any antivirus software and will only get better in the future.MBAM will NEVER add antivirus abilities to itscore app and is always advised to be used WITH antivirus software. We actually get this question a lot in the forums and I assure you that we always say :
"No, MBAM can't replace your existing antivirus software and is not designed to."