anyacat

I am simply putting the disk (reinstallation CD Microsoft windows home edition" and trying to boot computer from it. Or I tried to just open it and start installation. That's when the message pops up. I have used this CD on other laptops with no problem.
I also tried to use Vista and it wouldn't install saying it requires 512 memory, when this dell is only 254....

please help me to reinstall the os...or maybe there's a good spyware removing program that will help? I never really had to deal with viruses before, so this is very frustrating.

thanks