Get http://www.warp2search.net/forums/viewtopic.php?t=4139 TUGZip same as winrar but FREE. It does all winrar & winzip can do. Perhaps you should close all applications before opening the zip file. I needed to do something similar (downld a .dll file but didn't have any complications.) Perhaps a reboot will help (close off all other apps.) Or even boot into safe mode.