Run Dll error. c:\windows\system32\gvwjtvrf.dll

Hi

I have a problem where I am unable to connect to the internet because I seem to have a .Dll file missing.

I recently scanned my pc using AVG Free, it came up with over 6000 infected files. I deleted all of them and I think that the .dll file in question was one of them. Now when I log on I get the Run Dll error appearing and I am unable to connect to the internet.

If anyone can tell me what this file is for and how I can go about fixing this problem I would appreciate it.

Thanks