If you are having an AVG 2011 software, and you tried to update it today, you might not be able to boot up your computer again. This is due to a botched update.
Please see update towards the bottom of this post
we regret to inform you that latest virus database 271.1.1/3292 (432/3292) released 12:53 AM CET requested computer restart with inability to start the system again with error:STOP: c0000135 The program can’t start because %hs is missing from your computer. Try reinstalling the program to fix this problem.
We have immediately downgraded published failing version to fully functional 271.1.1/3291 (432/3291).
If you have unfortunately met mentioned error, please follow these steps: