It almost sounds like you accidently logged in to the Administrator account in Safe Mode. Try restarting your computer to see if that resolves the issues. If that does not resolve the issue try using System Restore and select a restore point made before the problem started. If System Restore does not help you can change the screen resolution by right clicking the Desktop, selecting Properties, then change the screen resolution to your preferred setting. If you have used One Care backup you can restore your favorites folder.