Network adapter - Intel Pro 1000 MT Desktop Adapter - Cannot save settings

When trying to save settings for the Intel PRO 1000 MT desktop adapter in 
Windows XP I encountered a problem where the OK button did not close nor save 
the settings.

To solve this I used regedit to manually edit the settings in the registry.
I found them at the following key (folder):

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\
{4D36E972-E325-11CE-BFC1-08002bE10318}\0032

To find it I searched for "SavePowerNowEnabled" and "8086".

The settings are not totally self-explained, here are some examples:

"Reduce link speed during standby" = ReduceSpeedOnPowerDown
"Reduce link speed  to save power" = SavePowerNowEnabled

(You may start regedit using Start, Run, regedit [Enter])