Windows 2000 supported Active Directory, which replaced NT's domain system and made network administration simpler. This was a major redesign of the directory structure for companies. More stable ...

That was first added in Windows XP ... 2003 R2, which bundled the first service pack and some optional new features, was launched on December 6, 2005. However, it is an outdated operating system ...

If the Windows popup "Digital Signature Not Found" message, press [Yes] to continue the installation. Step 4. Finally, select to restart the system and press [Finish] to complete the installation.