virtualbox.org

Can't get the virtual machines to start. THey freeze at 0%

Not enough information to be able to help.

http://forums.virtualbox.org/viewtopic.php?t=8208

Recently, I installed W7. The virtual machines worked for awhile, then, after installing a program that shows that my computer does NOT have virtualization abilities(my *** it doesn't), the machines get stuck at 0% loading.

Are you trying to use Windows 7 RC as the primary OS?

Yes.

Windows 7 beta & Release Candidate is a development OS and not supported by the community (us volunteers/mods) directly. Because it's still in development, changes can be made at the last moment, which could cause to render all support done in previous versions useless and possibly cause serious issues.

http://www.microsoft.com/windows/windows-7/faq.aspx

Please read the section Are there risks to installing the RC?

Thanks, but I did a system restore just a minute ago, and everything went back to work.