I have everything checked and let it delete all. The worst thing that happens is I have to put my user name in again on a particular site like Ancestry or my bank. There are other cleanup things I use as well so that my computer can stay in reasonable shape. I have no patience for waiting and waiting and waiting. Also, Disk Cleanup is a Windows application - it would not do anything to harm your computer. After cleanup, do the Windows application of disk defragmentation which may take quite awhile. Disk defrag moves chunks of info around so that they are with other like chunks. This also speeds up your computer. If you haven't used either of these processes before, they are going to take awhile. Ruth In a message dated 10/24/2009 10:07:54 A.M. Mountain Daylight Time, Roulx@aol.com writes: If I run this and it comes up with a window and has several things checked, will I be losing anything important if I continue? I think that is the reason I have so much junk on my computer....I am always afraid to discard anything unless it is just old email. Patricia In a message dated 10/24/2009 12:00:30 A.M. Pacific Daylight Time, aolers-rootsweb-request@rootsweb.com writes: Have you performed the usual "Disk Cleanup ********* Visit the threaded archives of this list: http://archiver.rootsweb.com/th/index/AOLERS-ROOTSWEB ********* ------------------------------- To unsubscribe from the list, please send an email to AOLERS-ROOTSWEB-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message