Hi rbala,
Thanks once again for the feedback - please tell us the name of the AV support personnel removed. Once we have that we can try something more to clean it up and provide a clean install.
Also please answer the following that epterweb asked for earlier in this thread:
What version of 360 are you using? Click on Support - About from the main 360 screen.
Please tell us if it is N 360 Standard or N 360 Premiere edition.