Pioneer dvd-rw dvr-k17 problem

I had the same problem, it occurred right after windows installed sp2 and my laptop showed no dvd player with any program, I restored my laptop to the previous day before the update and it worked fine again, after that I just let windows update by itself and it has been a week and everything is fine, also in device manager open the dvd + sign and right click your dvd and click update drivers, if that does not work, right click your dvd, and then click delete, and then reboot your computer, laptop whatever and the computer will automatically recognize the player on startup and it will install again and hopefully that will get your drivers updated, do not worry about deleting the dvd player, it will reinstall all by itself, just have to reboot..thanks

it's windows problem.
basically you need to edit (delete) registry.
follow this step from microsoft.
http://support.microsoft.com/kb/314060