Tech Paul has an excellent ‘how-to’ on the Windows 7 Blackscreen. He truly taught an old dog a few tricks with his article.
Video adapter problems are the most common cause of this issue. First, try to find out if there’s a problem with the cables you’re using or the way they’re connected. If you have an alternate way of connecting your monitor to your PC, try it.
If you’re looking for a painless way to run Linux without having installed any one of 200+ distributions to your Hard Drive, or without having to boot from a Live CD, then open source Linux Live USB Creator could be the perfect tool. In a very simple process, Linux Live USB Creator will install any one of a huge range of Linux distributions to a USB drive.