Startup error! Unknown filetype grub rescue<
 

I just installed ubuntu on my computer that already had windows 7 on it so I could dual boot them. After installing ubuntu and playing around on it a little I went back onto windows. I then restarted my computer and now it won't startup. I get an error that says unknown filetype grub rescue<. I don't know what to do to get back into windows or ubuntu

I literally just got into this so I have absolutely no experience with this stuff.

Do you have Desktop version of Ubuntu?

Yeah the newest version