Avast setup fatal error

There was some kind of disk scan that avast! wanted to do on my computer and ever since I ran it, there have been multiple issues with my computer. Right now there is an avast! Setup Fatal Error that reads: Error reading product data from "C:\part-setup_ais-ffffffff.vpx". Setup cannot continue.

I'm also getting a java error now: Revocation information for the security certificate for this site is not available. Do you want to proceed?

There's another error called File Name Warning that reads: There is a file or folder on your computer called "C:\Program" which could cause certain applications to not function correctly. Renaming it to "C:\Program1" would solve this problem. Would you like to rename it now?

I have no idea what's going on. Please help. Thank you.