Hardrive Booting Question

[MegaMasher825]

Remember when you had a ps2 and your friend had a ps2 and 1 of you would bring along your memory card to play their games on your system? Well imagine that, Except with 2.5 inch hard drives allowing friends to essentially have their computer, on your computer. Is there a way i can do this without having it my pernanant boot drive? Like just setting it to boot once? I'm not the most experienced with the boot menu in particular but i am considered moderately technically inclined amoungst friends. Is there any risk in doing this? I want my friend to be able to experience her computer on my $2400.00 computer.

[Chriz6097]

You could have all your games on a separate hard drive so that all you need to do is log into the computer.

edit: something like this maybe?

[T.Vengeance]

Well for games at least, all you need to do is to put your steam library on that drive, go to your friend's computer and just log in to your steam account. 

[FlakeyBanana]

Yep just make a folder for your steam library on a separate drive, but it's highly likely that your save files are somewhere else