My computer crashed about 7 months ago. I got it fixed, but I cannot run my dvds on cyberlink power dvd anymore. Just windows media player. I would like to run it cause I could play the dvd fast foward and watch dvds quicker

There are several probable classifications you may want to check out.
1. The DVD disc could be broken or have physical damages.
2. Your DVD drive is not working properly.
3. PowerDVD media player might have issues.
4. Power DVD not playing DVD with region codes.

You can check on this post for solutions:
Why Won't My PowerDVD Play DVD

When u put the disc in does it automaticly open windows media player with the movie? if so after the dvd is in close media player ,go to "my computer" then go to the drive your disc is in and right click chose explore or open in new window on the video files u see right click one of them and choose "open with.." then click browse and navigate to your c:/drive program files and look for power dvd u will need to select the powerdvd.exe also make sure the box is ticked that says always use this program to open this kind of file ......make sure u have the rite codec's installed as well this link is for windows XP video codecs http://www.free-codecs.com/download/XP_Codec_Pack.htm this one is for windows vista http://www.free-codecs.com/download/vista_codec_package.htm and this 1 is for windows 7 http://shark007.net/win7codecs.html