Just tried 18.104.22.1686 and I still have the same problem. Found the following keys in the registry:
However, changing the values of these keys has no immediate effect on the scaling and the registry changes revert to their previous values after rebooting.
All of the above threads seem to describe a similar issue. It seems like the driver gets 'stuck' on a particular scaling option (and which option seems to be random) and you can't change it back, not even in the registry.
It seems somthing wrong with the new drivers from intel. I have faced same problem here on my laptop. For testing I've installed the driver from Microsoft Windows Update and now the Panel Fit Scalling is working fine.
1. uninstall the driver from device manager also check "delete the driver software for this device" so that it can't install same driver again.
2. restart your computer
3. after restart go to control panel > windows update > check for updates
4. select Important Update > Intel HD Graphics driver and install.
Intel Core i3 2.53 GHz (380M)
Intel HD Graphics
Windows 7 Ultimate x64