you will have to boot up your computer from the windows 7 DVD and repair the installation (I guess its called startup repair).
OR
If you have Windows XP installed on the same PC, then use Vista Boot PRO (Totally free) to restore Boot manager info to your windows 7 partition
Device Manager
Device Manager
probably not google the question to see why
False
Windows Explorer is a file manager application that is included with releases of the Microsoft Windows operating system from Windows 95onwards. It provides a graphical user interface for accessing the file systems. It is also the component of the operating system that presents many user interface items on the monitor such as the taskbar and desktop. Controlling the computer is possible without Windows Explorer running (for example, the File | Run command in Task Manager on NT-derived versions of Windows will function without it, as will commands typed in a command prompt window). It is sometimes referred to as the Windows Shell, explorer.exe, or simply "Explorer".
Yes you can, Windows live is not part of Windows itself. For example Windows xp home addition has nothing to do with Windows live messenger. You can safely remove it without worrying about it affecting windows.
Any application not written for Windows can be used without Windows.
you can't. W.G.A. [ Windows Genuine advantage ] is a Windows download
There is no way to downgrade from Windows XP to Windows 98 without formatting.
Switching from Windows ME to Windows 2000 cannot be done free of charge legally.
If you have Windows you already have ntfs. Windows doesn't use ext4 at all without IFS drivers.
Do you mean upgrade to Windows 7 from Vista? Yes, without a doubt.