Got it to work!

The issue is caused by a program called I n k S a v e r who runs at startup installing itself under HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run. Didn't go deeper but happy cause I found the culprit.

Putting 7TT startup entry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run to make it run before that program does the trick.

I know this is not the correct approach to solve this, but, i'm the lone user on this machine. And works like a charm.

Great answer. I'll run some tests and come back to report you.

I'm anon.
No, no properties are set. Even setting to "Windows 7" alone didn't get the trick too.