This may sound counter-intuitive, however try this: Re-install AVG, and then uninstall AVG. Hopefully, by reinstalling, shell.dll (should) be put back in place. Then an uninstall (again, should) go without a hitch.
Okies that worked for the shell, I think that is taken care of however, (o how I hate howevers sometimes lol) I am getting this error when I try to uninstall or install AVG again, I am wondering if this is something that I may need to get ahold of AVG for, maybe something is wrong with their download? What do you think? ....
Search the two folders mentioned, and see if you find copies of the file there. (You might need to change, in 'Folder Options', these settings:
Open up 'My Computer', go to 'Tools -> Folder Options -> View' enable 'Show hidden files and folders'. and deselect 'Hide extensions for known file types' and 'Hide protected operating system files'
You'll need to delete the files because they may be altered, infected copies, and then copy the freshly downloaded file into both directories.
No guarantees, but it's a technique which has worked for others.
Windows most likely won't allow you to delete the file directly, and you might have to do it from DOS. If so, pop a new floppy disk into the drive, open up 'My Computer', right click the drive and choose 'Format'. Ensure that 'Add system files' is checked, and you'll end up with a bootable diskette to which you can add the SHELL.DLL file and use DOS commands to copy it to the necessary directories on your hard drive.
ut-oh sounds like I may have gotten into something bad on pc, thank you both so much for your advice & I will try your suggestion Catweazle & I will get back to you in a couple of days to let you know the status of this problem.