AVG is a very good FREE download.
I also have a FREE download of Malwarebyt/Anti-Malware
I also run a Free downloaded cleaner daily.
These were recommended by someone on the board.
POINT OF INTEREST...
A lot of people are not aware of this...
I was told by computer fix-it Co.
Anytime you are googling or what ever it is you are doing and you get HIT by any type of attack...
IMMEDIATELY...shut PC off...MANUALLY
DO NOT TRY to back out of where you are...
SHUT YOUR SYSTEM DOWN...right away.
This really helps as I have had to do it when on Google.