photoshop stopped working while i try to scroll fonts

Have you added any fonts?

Try to reset the Photoshop preferences. Sometimes it may help.

Reset preferences in Photoshop | Photoshop

Remember to back up your settings before doing the preference reset: Back up and restore Photoshop preferences | Photoshop

If this doesn’t help, we need also informations about your system. Which operationg system, how much RAM, which graphic device etc.

The best is to provide a copy of your 'System Info' if it's possible. This can be get from the Photoshop menu item Help > System Info. There's a copy button in the System Info dialog. Press this button and paste the info into your next forum post.