Can you even boot Windoze from USB? Anyway it's not safe for the average Bitcoin user due to all the malware and viruses. Plus Linux has proved its stability while Windoze will restart nearly every 24Hrs if you have updates on?
gotta love the FUD.
My WIN7 machine with 5x 5830's was up for 3 months before a power outage forced a reset. Also, I have an expired trial version on there and it still works fine.