Hey hookah

Check for sysrnj.exe (certainly in c:\windows\system) folder. Could you access registry.

Once i too had the same problem. If i double-click an .exe file winzip.exe gets opened. But you can open a file (eg. example.doc) by dbl-clicking on it. My box is installed with Nor. AV2002. It did not reported any virus.

Symptom:

This particular file take control of all the executables in the system.

Change of Application to EXE file, Bitmap image to BMP File, etc.
- Actually Windows displays an executable as "Application"

Solution:

Boot the system with virus-free floppy and reinstall windows. Once it is over,
1. Delete sysrnj.exe from HDD.
2. Run regedit.exe.
- Search for sysrnj.exe entries and delete.
- Search for rnjfile and delete.