I am currently using a Windows 7 Home premium, and I got it by upgrading my laptop with a CD i was sent as I purchased the computer and I obtained the free upgrade disc. I have tired to use WGA Diagnostics tool but nothing works. This is the problem: Windows cannot install required files. Network problems may be preventing Windows from accessing the file. Make sure the computer is connected to the network and restart the installation. Error code: 0x80070005 I'm connected to the internet with no problems, and really want to reformat my laptop as it is starting to get slow now. Thanks