It's unclear whether you describe clicking a Start Menu shortcut, or the .exe
file directly.
If you cannot run any .exe
files from Windows Explorer:
The new user accounts (and the "Default" account, which Windows uses as the template) might have corrupted file associations, pointing all .exe
files to another program (often – malware that has been incorrectly removed).
Log out of all affected accounts, log in as an administrator, then delete the file Local Settings\Application Data\Microsoft\Windows\Usrclass.dat
from every affected profile.
Also delete C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Windows\Usrclass.dat
.
Usrclass.dat
holds per-user file associations, and is reasonably safe to delete (on most systems, it'll only have less than a dozen associations which can be easily fixed – the rest are stored system-wide).
If you get "File in use", run regedit
, expand the HKEY_USERS
key, and unload all subkeys named <sid>_classes
(using File → Unload Hive).
When you say built in programs, you do mean programs like calculator, paint, and notepad? – Josiah – 2012-10-03T15:26:29.367
1I assume you're currently trying to launch the programs from a shortcut (desktop, Quick Launch, Start menu, etc). What happens when you try to run, say, Notepad directly (
C:\Windows\system32\notepad.exe
)? Can you install and run third-party programs? – Indrek – 2012-10-03T15:42:50.257