thumbs in my library...searched but no results
 

hello all! lately i have noticed when i am downlaoding, it takes a while for my preview to show. its like my computer slowed big time. then i notice "thumbs" in my library. it's in red letters. once i delete it, everything works fine. im thinking it's a virus. everything else runs fine though. i ran my comodo anti virus in safe mode but it finds nothing. my cpu usage seems to be normal too. can anyone help me?

ok i started digging harder in my computer and i think i have solved it myself. i used windows search and nothing came up. then i searched in sub and hidden folders. then a whole bunch of "thumbs" stuff came up. some siad it was a firefox userdata file. the others were some kind of sports websited data or something. i had to delete them one at a time. it actually took a while to delete each one. but ever since i got rid of them, the computer has been faster and smoother. but i just dont get how my anivirus program did not pick it up. maybe since it tried to hide in a user data folder. i dont know but i hope it is fixed!