My Dell Inspiron 620 (about 4-5 years old) is running unbelievably slowly, especially when browsing (and playing Farmville). I have tried everything, and am trying to download Windows updates (which I realised I hadn't done for about a year) but am unable to download them. I am constantly on 0% downloaded. I have left the PC running for several hours and tried just downloading one update to no avail. Among the error codes I get is WindowsUpdate_80070005. I have Googled and one suggestion is that I am not running as an Administrator. I have had this problem with other things, however, I am the only one who uses this PC and I have never set an administrator up. Any help greatly appreciated as I don't want to break the credit card buying a new PC to find my Internet speed is part of the problem - I want to try everything I can with my current PC first. It is an i5 2300 CPU @ 2.80 Ghz with 6GB RAM and a 64 bit system. It is running Windows 7 Service Pack 1.