- Edited
I previously said Windows 10 1507 is more tolerable than Windows 7. I was wrong. The updates that you mentioned @Sunspark (Platform update, IE11, etc.) really do ruin Windows 7. Using Windows 7 with NO updates has been an upgrade (lol) vs Windows 10 1507.
I would like to try Windows 8 with no updates, since "DPI Virtualization became the default for all settings over 96 DPI in Windows 8.1." This is similar to the problem that causes Windows 10 1507 to have blurry fonts.
Microsoft really started messing up rendering far earlier than Windows 10 1607, although obviously that was a very big change for the worse.
Edit: Windows 8 no updates no driver is strainy. Actually it feels much like Windows 10 1507. Not terrible but still strainy. The basic driver in Windows 8 is too capable. I guess the only way to truly stop the GPU acceleration is:
Windows 7 no updates no drivers
OR
Windows XP can be tolerated with drivers. Probably technical limitations of the old XP display driver model.
Edit 2:
XDDM supported on Server 2008 R2. Could install drivers on this (still security updated), with benefits of old 2000/XP driver model @KM ? It should be Windows 7 except with this support? Maybe we can use strainy cards which we can currently only use in XP.
Edit 3:
I could not get Nvidia XPDM drivers installed on Server 2008 R2.