Here are some more information for Basic Upgrade:

Windows 7 Best 3 Upgrade Methods

Upgrading any windows system can be a non-event with just a little planning. Of course many people will have older computers that may not be a good candidate for upgrading. How do you know if your current computer has the necessary requirements? If it's got Vista of any flavor it should do all right. Most computers that came with Vista installed should meet the basic requirements for Windows 7.

If you have an older Windows XP computer, it may not have the power. Regardless of what Microsoft says you probably want at least a duo processor and 4 gigs of fast RAM (DDR series). It also helps a lot to have dedicated video RAM or, better yet, a video card with it's own RAM of at least 256 Megs. Windows 7 is much better about being a resource hog but it still needs some power to perform at it's best.

If you now have a computer with Vista and don't have any problems, I don't think there is much in Windows 7 that is worth the $100 plus upgrade. Ease of use is no big deal, and the performance over a Vista machine may not be that great unless you have current issues. Vista got some bad press over performance issues and rightfully so but from what I've seen, not all Vista computers exhibited this problem. I've upgraded well over 100 Vista computers for clients and many did not exhibit any faster operation with the exception of shutdowns.

OK, so you decided that you just have to upgrade for all the whiz-bang new features. Here's the three best ways to keep your data and your sanity. You can also run a program from Microsoft called the Windows 7 Upgrade Advisor that will warn you of any incompatibilities on software and hardware on your current system. You can find it by doing a search in Google; it's available at many websites.

Option one is if you have an older Windows XP computer you have two basic upgrade options. You can't do an upgrade in place, too many issues and Microsoft decided against it. So now you have to do a clean install. Microsoft warns you that this may take a few hours! Yep, that's not a good thing. But most I've done have been much shorter.

Before you start you should back up all data files (user created), music files, photos, videos, or any other files you want to keep. You should also round up all your software install CDs for any software like MS Office that you plan on installing in your new Windows 7 OS. Don't forget to back up your Favorites (IE browser bookmarks), your Outlook data (outlook.pst

About the Author

Get the five must have utilities that don't come with Windows 7 here: Windows 7 Utilities. Want to keep your Windows XP system and make it faster? Go here: Windows XP Repair.

What happens if you upgrade Vista Home Basic...... to Vista Home Basic?

My computer originally came with vista home basic. But its a lot slower now than it was before. I wanna reinstall vista home basic as an "upgrade" to see if it overwrites my operating system files.
Would it work?

No,
i don't think the Windows installer provides you an option to upgrade to your own / lower versions. (please correct me if i'm wrong)

If it has a selection to upgrade to your own version, then it's likely that it will replace your system files. (but this may not help since your program and other files which may cause those slow-downs are not removed during the upgrade)

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