Sorry this is my first post and hope I have it in the right place!
I have a Server running Server 2003 SP2 - upto date with all patches etc but have noticed when it down loads updates the zip file comes down and gets unpacked. The old pattern file doesn't get removed and the zip file remains. If you try to manually remove the folder it says that the avvclean.dat file is is use and can't be removed. Checking the registry as per another post the registry setting isn't updating and is using the file. You can manually change it to the current avvclean.dat file and reboot server and then that one stays unable to be removed.
Any help would be greatly appreciated