Firstly, in order to activate the XP Mode VM in virtualBox, I set
HKLM\SOFTWARE\Microsoft\Windows NT\WPAEvents\CurrentVersion\WPAEvents\OOBETimer to
FF D5 71 D6 8B 6A 8D 6F D5 33 93 FD and then denied SYSTEM's permission to the
To check activation, run
%systemroot%\system32\oobe\msoobe.exe /a. Bad idea, grace period (a.k.a. time bomb) still expires this way and can be reset at most 4 times using
Although both processors show up in Device Manager, they don't show up in Task Manager.
The "Computer" tab does not show a multiprocessor ACPI.
In order to allow multiple processors to be used inside the VM, I have to install the multiprocessor HAL
halmacpi.dll and kernel
I find those files in
sp3.cab and copied them to
Then I added the options
/kernel=ntkrnlmp.exe /hal=halmacpi.dll to the last line in
\boot.ini and rebooted.
\boot.ini by selecting Startup and Recovery Settings from the System Properties "Advanced" tab.
After rebooting, new hardware is detected and both processors now show up in Task Manager.
Finally, it's a good idea to turn off the login window by running
control userpasswords2 and clearing the "users must enter a user name and password" tick box.