I have similar problem that was mentioned in the other tread in addition that I couldn't boot an older Dell PC either. Up to the last update that I had I was able to run BitDefender rescue disk without problems, but after that I can't even use my older version anymore. Now I just downloaded and burned the recommended version, but have not tried it yet. According to the other person it didn't help him. Because you probably want to know my setup anyway, I will give the details here:
System is done by myself
Gigabyte MB: GA-P55-UD3P
Intel CPU: i7-860
RAM: Kingston HyperX PC3-12800 RAM 8Gb
Graphics: HIS Radeon HD 6770, Dual Monitor setup
HDRs: Western Digital Black 1Tb, Western Digital Green 2Tb, NO RAID
Sound: M-Audio Audiophile 192
DVD burners: LG Super-Multi 20, Asus DVDRW DL
No over clocking