As a last recourse, try a Safe Mode reboot or a selective startup, disabling any unknowm programs or processes and see if you can narrow down who is creating the files and when. BTW, it does seem unusual for them to be created in the Windows folder. Very messy...

>
>But try searching instead, not the registry, but the Windows folder, for files like *.TMP, and see whether you get these strange files with zero bytes. The exact filename - if these files exist at all - can vary - will vary, in fact, since the filename is likely derived from a GUID.
>
>Hilmar.