You can't install WINDOWS on a PS3, as you are posting in a PS3 related forum. 

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Need help? Are you new to the PS3 scene? Ask your questions here; but look [HERE] FIRST!

Your question is totally unrelated to PS3 HELP.  There is another section here for "Personal Computing/Technology", and since you did NOT post there, Windows isn't transferring to a PS3.  However, I am ASSUMING this is for a PC, so I moved it there...

Maybe you want to elaborate more, and you get MORE...  I think it's because you are not really explaining what you want, so I don't really know what to tell you either, so I have to guess?  Well, since we have to guess, then the help you get may be FRUSTRATING, WRONG, or NOT related to your subject, that's your fault.

Anyhow, by your subject, we are to "ASSUME" that you copied your WinOS over to a flash drive?  Well, you can't just transfer it just by copying the contents of the O/S to it, it won't work.   You WILL have to reinstall it on an HDD from scratch.

IF you want to argue, then someone else can help you, it ain't happening.