Looking on the internet deeply has found these results:

run on windows is the most popular phrase on the web.

run under windows 1278,000 results on the web	run on windows 1602,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
This company has had a bad run under your watch. This company has had a bad run under your watch. Bartik and Hopper found some tunnels that run under the outlands. I tried to run under a train. Patches to make Krecipes work under Windows Besides providing all the required software signal processing for the PC platforms, the PERSEUS software has a comfortable graphical interface, is simple to use and runs under Microsoft Windows 2000, XP and Vista. The tunnels must run under the house. That runs under London and Blackwall.	KDE does not run on Windows 95/98/NT or OS/2 (yet). Run window in monitoring (non Tom's computer is so old that it still runs Windows 98. He uses useless virus scans, dated servers, and security software that runs on Windows 98. that the machines will run Windows XPe? interactive) mode. XviD is a primary competitor of DivX (XviD being DivX spelled backwards). While DivX is closed source and may only run on Windows, Mac OS and Linux, XviD is open source and can potentially run on any platform.

run under windows

1278,000 results on the web

run on windows

1602,000 results on the web

More popular!

This company has had a bad run under your watch.
This company has had a bad run under your watch.
Bartik and Hopper found some tunnels that run under the outlands.
I tried to run under a train.
Patches to make Krecipes work under Windows
Besides providing all the required software signal processing for the PC platforms, the PERSEUS software has a comfortable graphical interface, is simple to use and runs under Microsoft Windows 2000, XP and Vista.
The tunnels must run under the house.
That runs under London and Blackwall.

KDE does not run on Windows 95/98/NT or OS/2 (yet).
Run window in monitoring (non
Tom's computer is so old that it still runs Windows 98.
He uses useless virus scans, dated servers, and security software that runs on Windows 98.
that the machines will run Windows XPe?
interactive) mode.
XviD is a primary competitor of DivX (XviD being DivX spelled backwards). While DivX is closed source and may only run on Windows, Mac OS and Linux, XviD is open source and can potentially run on any platform.