"I'm assuming you meant use one finger to click the left mouse portion of the trackpad [while on top of the desktop-ie-scrollbar] and another finger to drag elsewhere on the trackpad [to cause the scrollbar to move]"
Right. It's certainly possible it was a bug due to the demo software on the machine that inserted those "swipe here to start" things around the screen.
gamescompat rant inspired by (1):
Personally I'll stick with 7 on the desktop as it's just not realistic to make breaking changes in the OS and try to maintain high level app compat without some sort of "let anyone submit the necessary appcompat flags into the public db to get this obscure app working" method in place. The compat. updates that come with Windows Update at best address the tip of the iceberg of the broken apps. Now you could argue that maybe MS doesn't want to have too much appcompat as then the devs can pull a "gog", selling same old stuff with few fixes built in. But the problem is, all those (game) re-releases never work as I want them to, because the games just don't look and sound right unless the PC also has the hardware, and those re-release don't support configuring the games for some long since obsolete hardware, or they might not be the right version of the game with particular hw support etc.