I am running 64 bit Windows 7 Ultimate, logged on with administrator privileges. When I try to run pagedfrg.exe as administrator, I get this error. http://crash.thedatalist.com/temp/snapshot.htm I have tried "Troubleshoot compatibility" to no avail. I have the latest version of PageDefrag available on the Microsoft site, version 2.32. -- Crash One man's weed is another man's wildflower.