Quote from DragonkofJeremy.
SecuRom installs itself into the computers Kernal (Ring 0), and installs another part into its normal application ring, also known as ring 3. Since the main program is inside the Kernal, it can do practically what it wishes. It interrupts and messes around with programs such as Nero, and other burning/ripping/mounting programs. It also messes with Task Manager. It removes itself and other parts from the processes menu, meaning you cant stop it, even in safe mode.
SecuRom, as it is programmed to do, will run checks on your CD's, to see if their legit. They force your DVD drives and CD drives to do so, in which case, they are not designed to do. They become instable and crash.
If you have any sort of program it thinks is a pirating program, it prevents the game from loading, mentioning some sort of emulation error. Forcing a honest buying into cracking his own game. WHICH THEY BOUGHT.
There has been cases of Anti-Virus's being shut down and stopped by SecuRom, as part of secuRom is technically a rootkit, as it is inside a part, it shouldnt be.
There are other things that SecuRom has been accused of doing, just on the programs assumption, like "Oh, this person has 2 Disk drives. THey must be a pirate!" and stopping the drives from working."
The only way to remove it known to me is to do a re-format of your disk.
Now that is the kind of stuff which is completely shit. But then again it is all because of piracy that developers and publishers feel that they need to do such radical things.