The only operating system I've ever had problems with, in the 6 computers I've owned (this being the sixth one) was Windows Millennium Edition, commonly called Windows ME. It was so horrible that I couldn't do anything on the computer without having a whole bunch of ridiculous error messages, so the technician upgraded me to Windows XP. This happened back in 2002 when XP was kinda new. My first laptop that I had before this one had Windows Vista on it, and while everyone has problems with their computer every once in a while, in my opinion, I wouldn't consider Windows Vista horrible because I never had a problem that made me want to downgrade to XP or upgrade to another OS. I couldn't have done it anyway because the hardware on that computer was only compatible with Vista, but I had an okay experience with it. I only got this computer because I needed more advanced hardware, and it would've cost a lot of money to buy that hardware and install it on to that computer, so I just got this one. As long as I have a computer, the OS doesn't really matter as long as it doesn't cause me a tremendous PITA like ME did.