I just finished in Saarthal and headed up to the college of Winterhold. However, I could not get in! It was locked at the gate. It says I need a key to get in. Please help!

Save the game then exit and load that save. I had that happen once at the college and that's how I fixed it.

That did not work sadly...I also did azura's star quest now, but I cannot get out. I tried both ways I kill the head wizard and I am just stuck there.

PC or console?

If PC, open the console (~ key) and click on the door. Then type:

unlock

That should get you going.

If console, I have nothing more to offer sadly, sorry. (Consoles have no "console".)

I will try that. It is PC. Hope it works.

Thanks so much. It worked perfectly!