A:AnswerI installed Windows 7 Home Premium upgrade on my son's Toshiba laptop which had Vista, and it worked perfectly. His laptop motherboard is limited to 4 gb RAM, so I'm not sure about your Asus X83vb. But I CAN tell you this...
Unless you install the 64-bit version, your system will not recognize more than 4 gigs of RAM anyway, and I basically tossed my Win 7 Home Premium 64-bit drive because a lot of my old but good programs would not work with it. I mean, I have it but I never slip it in because I think the 64-bit version is less stable and fussier. And if you have Vista, the 64-bit version may not install easily. So I would use the 32-bit version.
A:AnswerI did it on my son's Toshiba Satellite that had VISTA, and it was effortless. I don't think it's a fast as a clean install. But the Win 7 upgrade will seem like heaven compared to Vista. That OS was the worst ever.
A:AnswerDo and internet search on VLC Media Player which is a free software to play multiple video formats such as DVD. Read what it can do and consider using it.
A:Answerno. You can't update it from XP to 8, but you can do a clean install. That means you would lose all your pics, music, documents, etc. unless you backed them up first.
A:AnswerYou should have no problem upgrading your Dell with Windows 8.1 from Windows 7. Everything you need is included on the install discs or online when you install. Be sure to backup your bookmarks and other settings.
2 gigs of RAM is fine, though if you can afford some new RAM and you are comfortable installing it, I would get two sticks of 4 gigs and boost your overall preformance.
51 gigs should be fine (my windows folder only takes up 17 gigs)