Computer problems thread

I just couldn't figure out which section this belongs, so I put it here. If a mod can find where this goes, they are welcome to move it.Anyone who has computer problems can post their problem here. Anyone can tell them how they can fix it. For those who are answering, please quote the problem so the asker knows you are responding to them.

we have an entire section for this...

That would be this and this. Though the former is more frequently used.