Ok, first you should curse Sony for being a c**k-sucking mutha-f***er piece of s**t to have invented securom(the protection) that does not work at all but to cause trouble to honest players.
Then here are possable problems:
1) There is a certain conflict about securom with a couple of windows updates. Namely microsoft closes up the exploit securom is using.
2) probably not the problem you are facing, but some software are blacklisted by seurom and you will get some other error if you have them running in the background. Things like debugger and drive emulation is obvious, but also useful softwhare like DVD regionfree(which is IMO important for everyone) I mean whatthe%^$& whazzup with backlisting software that has nothing to do with your CD authentication...
Then again ever since the much attacked rootkit incident by that sony team they are still on their evil ways, and I would be celebrating if they would one day paralyse themselves from accidents relating to tripping over from those over-priced PS3s.
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