open 98k3e2b5b29.cf in c:\windows folder and Command Propmt is the same problem. Repairing OS and "Sfc /Scannow" command cannot solve the problem. a new feature was added by Microsoft to allow the write protection of. I would prefer to fix one problem. When I open Control Panel, RegEdit icon is there, but when I want to open it, nothing happens. It's like. running WINDOWS 7 I cant get into regedit, when I type regedit in the run bar I get this error C:\Windows\98k3e2b5b29.cf Application not found.