Ok, I have found many examples of this but every solution I have read doesn't work for me, I'll start at the top in what steps I have taken to the current situation. On installing Windows 7 it worked flawlessly, proceeded to install apps etc, that evening I turned off. On login the next day no net access, on phone to India for 2.5 hours, solution given, disable UAC and remove all third party start up services and applications from the registry such as ATI's CCC, this solved the net connection issue and my ability to come online was resolved. Tried to swap some .wav files out, specifically the "sounds" for Avast with a popular user made pack. Was installed to "C:\Apps\Avast" as I went through the whole "Ownership" issue with Vista so avoid "Program Files" like the plague. No permission so do anything with any of these files or folders from standard admin account. Went through the often suggested "Take Ownership" steps, system claims I have ownership and full access rights yet still no permission to do anything. Finally gave up and enabled the true admin account from an elevated cmd prompt, here we are again still no permission to do anything. In a last ditch effort to save my sanity uninstalled Avast and this time installed to "D:\Apps\Avast" and went through all the above steps, you guess where I'm going with this didn't you, still no permission to do anything. Finally uninstalling and reinstalling back to "C:\Apps\Avast" in a moment of frankly utter desperation tried to give full permission to my original normal admin account to the entire C: drive. Now it's in an infinite check disc loop wanting to run it at every single boot where I cant even log on unless I tell it to stop and I still have no authorisation to do anything. I would use a "very very tired" emote if it was available.