CD drive not working please help

Hello,
I bought Microsoft's Vista Customer Preview Program. I bought it over the
Internet and installed it on my fairly new Compaq laptop. After the
installation was over I started reusing the laptop and found out that my CD
drive was not
working for some reason. Not only could I not read CD's but also the Burner
also didn't work. The system was also "blacking out" and running
abnormally slow for the system when I had it running on Windows XP
Professional. I was wondering whether I should uninstall or reinstall the
software and if so than how to. I emailed on microsoft.com before and was
told
to call this number: 866-234-6020. I called that number and was told
that I should write to this address. Whenever I use Microsoft Office it has
to reinstall. My System also goes super S-L-O-W! I would really appreciate
someones
help. I can not do anything on my computer without difficulty. PLESE HELP
ME!

--
KCP