found this user expierence on http://www.glop.org/forum/viewtopic.php?id=334
Starforce installs a driver in the windows/system32/drivers directory which MUST be installed by an admin account, the driver itself grants ring0 access on any user level opening up a rather large backdoor for other viruses or malware to act through. The driver works (as best as can seen due to its aggressive usage of the system - e.g you cant run a debugger on your system at the same time as the drivers nor can you see ANY memory locations it uses for itself or very often the game it will run with). It also performs checks on drives and will cause many errors in the event log due to the way it verifies CD’s, this eventually will force the users drive to run in PIO mode (and most people have no idea what PIO mode is let alone how to repair this.
As you probably know forcing a drive to run in PIO mode isnt a good idea.Furthermore Starforce will run on the system even when the game isnt running, one symptom of this is that starforce blocks the reading of DPM readings making it impossible to backup ANY software which needs these readings (basically every game out there).
Also when the game is removed, the starforce stays present on the users system and the user is Neither informed in the EULA or game that these drivers are being installed and that they will remain on the system, a tool is available on starforces website but it seems with the latest version of starforce it doesnt remove all the files anymore, so even when the game isnt present starforce is still hiding on the system preventing the user from using their computer how they want.
Starforce will also perform a system reset to protect itself if it thinks that someone is toying with it, this is probably one of the more dangerous things about it as it simply is terrible at this detection and often will reboot your system randomly, I myself once installed Colin McRae Rally 2005 and had several resets in game, after a few of these my HD started to make a strange noise and operate in PIO mode, I fixed this back to DMA mode and it reset another time, this time I couldnt ever access my drive again to the point where a format was impossible, the drive has been taken apart and I keep it on my desk as a reminder not to instal a starforce protected game no matter how good the game may be.
The newer versions of starforce will also replace system files (such as the USB driver) so its better able to detect if the disc is a copy or original, this is not good news as their own drivers are bad enough but replacing windows files is going beyond the limits of what anyone should take.
I also know several people personally who have lost optical drives (to my knowledge im the only person to lose a harddrive to it) and contacted SF to enter their competition only to be directed to (the rather terrible) customer support, he was told several times to do this and the comp ended.
There are also several known bugs that are easily reproduced such as nero incompatabilities, it stops the user being able to burn discs.
Starforces answer to this has been “our software doesnt do that but if it does we are covered by the EULA”.If you are serious about including starforce I must warn you that Starforce take an aggresive stance to those who speak out against them, you can find details at http://en.wikipedia.org/wiki/StarForce about some of these incidents and also more information about it there too.
after having issues with securom (BSODs), i’m not going to buy any product that comes with starforce copy protection after i’ve read this. actually this would be the first time i think of not buying qw: if it would come with starforce. hopefully that never happens 
what are your experiences with bugged copy protection?
