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Windows 2000 application compatibility mode

Windows 2000 has an application compatibility mode similar to XP's, but it's not enabled by default.
To enable it you need Service Pack 2 or higher installed.
Available compatibility layers are Windows 95, Windows 98 and Windows NT4 SP5.

To enable application compatibility, run this:
regsvr32 %systemroot%\apppatch\slayerui.dll

To disable it, run this:
regsvr32 /u %systemroot%\apppatch\slayerui.dll

To enable application compatiblity on 2000 Server SP3 and higher, you'll need to edit the registry.
Locate HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\AppCompatibility.
Create a subkey called Explorer.exe
In Explorer.exe, create a string value called DllPatch-x.
Create a binary value called x. Set the value of x to 0c 00 00 00 00 00 00 00 06 00 00 00 00 00 00 00.

For more information, see Microsoft Knowledge Base Article 279792