This happened to my exes computer. I -blam!-ing hate windows 8! Ok, for the antivirus your just going to have to reinstall the old one and delete AVG. Open Firefox, press Alt and go to Internet options and change your security settings. I have mine set to medium high. You might still have to add exceptions to your trusted sites list, but anything from a multinational should be ok. For your printer you need to go to control panel, hardware profiles ( it might be called add/remove hardware or something else, not sure with windows 8) find "printers" in the list, click the drop down thing and find your printer. Right click it and select update drivers. If that doesn't work search google for ([printer make and model] free driver download) and find one manually. Hope this helps.