Horizon won't open for me

I tried to open horizon last night and it gave me the reason as to why it couldn’t open, So deleted the 2 folders giving it issues to open and it opened up fine so i could mod forza 4, Now when i went on it today it won’t open at all, Just says Horizon has stopped working

do you have any anti-virus installed?

It opens the odd time fine and then it don’t 98% of the time lol

Just answer the question. You will find no help unless you are cooperative, panda.

I don’t have any anti virus installed!

Have you tried at least restarting your computer? Try that.
Edit: Use the compatibility troubleshooter and select “Windows 7” Here is how to do it: http://windows.microsoft.com/en-us/windows/make-older-programs-run

What OS are you using?

Windows 7 64 bit!