I've got a Dell Inspiron 1520 from 2007, and when I try to load any of the accounts on it, it is able to pass the login screen and get to a desktop. It loads the icons on the desktop, the background, 2-3 icons on the status bar, and then proceeds to completely and utterly freeze. When you mouse over the status bar, you get the hourglass hand. No desktop icons are clickable. Control alt delete does nothing, and I must shut it back down by pressing and holding the power button.
How can I fix this? What could be causing this to happen? I was able to successfully access my account two days ago with no issues upon startup, and I had not done anything out of the ordinary in my usage that could cause this to occur.
I know the laptop's old, but I can't get a new one yet.
EDIT: Update: I have run the diagnostic test thing from the F12 boot options. It has located no error. I cannot find Safe Mode anywhere, however.