how can you Delete an Undeletable File

Windows won’t let you delete a fi le if it’s currently in use, which is usually a good thing, but that can spell bad news when trying to rid your system of a nasty malware strain. Luckily, there’s a workaround. Click the Start menu, select Run, and type CMD to bring up the Command Prompt. Now hit CTRL-ALT-DEL to open the Task Manager. Under the Processes tab, highlight explorer.exe and click End Process.
ALT-Tab your way to the Command Prompt and then navigate to the directory of the fi le you’re trying to delete using the CD command (cd C:\Program Files\3DSaver). Next, use the delete command to delete the offending fi le (del 3DSaver.exe). ALT-Tab back to the Task Manager, select New Task under File, and type explorer.exe to bring back the Windows shell. Alternately, try Unlocker and delete stubborn fi les through a svelte GUI.