Hey, this is my first forum discussion ever
got the "cant start program because missing file on my windows, and I searched the internet...... no help!
SO, I figured it out:
1. go to uninstall programs
2. click avast to uninstall (don't uninstall completely)
3. then a avast screen appears that has tells you your going to uninstall, but has orange update, fix, repair buttons on left.
4. click update button, on the following screen there is a big square grey button on the right. press update a few times until it says #s instead of unknown in version box
5. then reopen avast, and you have to finish downloading the new version.... and its fixed!
I hope it works for you...... Craig