>Hi,
>
>My c:\WINDOWS\ directory is full of dozens, if not hundreds, of temp files that look like registry entries with a tmp extension. One example is:
>
>"fff32cfb_{2A9A2189-20E9-11D4-9A97-005004785AC9}.tmp"
>
>Questions for anyone that can help me.
>
>1) Where are these coming from?

No idea, but I'd look to the owner of the GUID (the thingy in curly braces) in the registry as the possible source.

>2) if they're temp files - why aren't they being trashed by whatever creates them?

A cow flew by, or someomne didn't exit from the app cleanly...

>3) I assume it is OK to trash them myself. Is there any reason I shouldn't? Any Gotchas?

If you smell some funny smoke coming from the back of the machine, I'd make sure I had an alibi...