64bit and x64 - Start64!
Installing several operating systems on one computer can be especially important during the phase of changeover. These systems often reside on different partitions of the same hard drive. After turning the computer on, a boot manager program is used to choose the operating system to be booted up. BootPart is in fact not a boot manager but helps to configure the existing boot manager.
Microsoft originally released Tweak UI as a value add tool with Windows 98. Since then, its popularity has grown and its usage expanded, and with it, its power as well. Today, Tweak UI is the best tweaking tool out there for the important changes, and Microsoft has refused to provide official support for it. While that is not an issue, and there are hundreds of support websites on the web, the fact that Microsoft has not yet released a version compatible with the ever-growing true 64-bit PCs is.