this is a scrrenshot of the SR window

well I had installed SageThumbs..a week before.so I don't think it's that..plus, SageThumbs is for image files but all my thumbs are missing , also I tried to disable it to check.didn't help...I don't exactly remember how this happened..I opened something..it was uTorrent or NOD32 ,don't exactly remember, and I return to the desktop see this..but this is all normal..I do this everyday..
now if I open DiskCleanup..Thumbnails are only 3.29KB...so Windows doesn't generate them..and also SageThumbs cache is also 1.5MB whereas it was ~14MB before the problem occured
thanx