Yesterday an update to the popular antivirus suite AVG left many users computers unable to boot. After rebooting, as requested by the AVG updater, Windows crashes while trying to load certain AVG drivers. The error message reads "STOP: c0000135 The program cannot start because %hs is missing from your computer". Since the culprit drivers load even during safe mode there is no way to boot Windows. AVG recommends using the AVG rescue disc located here. After booting from the disc users should use midnight commander to rename their AVG folder, usually located at C:\program files (x86)\AVG, to any other name and then booting windows normally. However, any bootable flash drive or CD with an OS that can access NTFS file systems can be used to accomplish this task. I used a bootable Ubuntu flash drive.