To put it shortly, I have that utility called advanced system optimizer and I performed a scan to find duplictaes on my partitions. It resulted a cluster of 10000 files. Ther are all kind of files and many are founded on several locations. I dont know if its safe to remove them and which exaclty should I remove( one from each group all etc). What put me on doubt even more is thati saw files bot located in c program data and in c users so I want to ask if its normal to have them simultaneusly in thse locations?