I like to think I'm fairly capable of using Google, and other search engines, in order to find what I'm looking for - including the search function on this site. So please forgive me if this has been asked.

Can Windows 7 be installed TO a flash drive, and be used to run/install games and applications?

I've only come across information about how to install FROM a usb/flash drive.

If it's possible - are there performance downsides?

Thanks for any input and help.