First of all, Norton and mcafee are both WAY overrated, especially Norton, and are resource hogs. Try all these. Note: you have to purchase Avast! professional as the Home Edition does not give you rights to use it commercially.
To get rid of most viruses, worms, adware, etc.
Download Avast! Home Edition as this is THE best free antivirus protection out there. (For you, you must download the professional edition.) It isn't a resourse hog and it scans everything your computer writes and reads as well as internet sites and emails. I love it. As well they update it about every day!
Proceed by downloading "SuperAntiSpyware Free" from the link below (As the title suggests, this is also free), follow any
instructions required to install it, update the virus definitions, then run a full scan, also clean any infections found
after the scan has completed. http://www.superantispyware.com/
You may also consider to be sure that all Malware has been removed from your system download “Kaspersky's Virus Removal Tool" (Free) from the link
below and run a full scan, this will already be updated to the day you download and install it, after the scan clean any
infections found. download here http://devbuilds.kaspersky-labs.com/devbuilds/AVPTool/
Consider doing a scan of your computer with MBAM and superantispyware every 2-4 weeks with a maximum of a system scan every month. (I recommend 2-3 weeks.)
P.S. make sure to unistall all other antivirus products before installing avast and never have more than one installed at a time.
Hope this helps and enjoy a better computer! Bitdefender Coupons