Using computer with admin rights allows more functions in Internet Explorer which sometimes are unwanted. It happened to me once and it was a virus which i couldn't delete. It disabled my task manager and my registry editor. Also it wouldn't be that bad. Try something that happened to my friend's computer.
1. Press Ctrl+Shift+Esc to open the task manager.
2. Go to the "Applications" column and click New Task...
3. Write down explorer.exe and anything should be fine now.
If it's not a virus then something deleted something from your registry.
If it's a virus i don't really know what to do because I just reinstalled my computer.
If it's a registry delete try to look up for it and recover it or else you would have to do these three steps anytime you are logging into an account.
I hope that helps.
I can only access my computer using the guest account. This is husband's computer and he has admin rights. When signing in to my or his account, we only get the wallpaper on the desktop with nothing else -- no task bar, no start, nothing to click on. I am limited in downloading/running virus scans because of the non-admin status. Is there any one who can help? Thanks, Alicia