An Administrator account and a Guest account.
There may also be a hidden Admin account with permissions beyond the local Admin, but that isn't typically an account a user will engage with or see.
Windows 2000
NTFS.
No it does not
NTFS
Internet Explorer is a default system for Microsoft. When you install the Windows Operating System, the default browser you will get is Internet Explorer. You can change to other browser options.
The file system type that windows server 2003 uses by default is NTFS5. This stands for native file system version 5.
Windows XP and Windows 7 both use the same file system by default: NTFS.
C:\Windows\
admin$
Windows 7
svchost.exe is the host process for windows services. By default it can be executed from any account including all three built-in accounts: System, NetworkService and LocalService. There are no accounts where it is not supposed to execute unless the system administrator has specifically denied access to it from specified accounts. However, it's the services themselves that should be restricted (where necessary), never the host process.
If uninstallation of the software does not work, try System Restore (included with Windows and turned on by default). Check your computer's Help for more details.