I have attempted to buy a few different games on different comps and the Process Order Button doesn't work. I click it and nothing happens. I've already ordered a dozen games or so from here and never had problems before.

Have you tried different browsers, such as Firefox?

No because IE always worked before. I just ordered a game a few days ago and the button worked then.

Reading this might help. Looks like majid01 had the same problem.

I saw that thread but I don't understand how IE works one day here then doesn't the next. I really shouldn't have to download a whole other browser just to get this site to work the way it did a few days ago.

Yeah, you really shouldn't, but technology kinda sucks like that.
Anyway, it's your prerogative to try it or not. Maybe someone else has a better option to suggest.

Have you tried right clicking the button and Open in new window or Open in new tab ? Not sure if it will work but it's worth a shot.

I downloaded and installed Firefox but the order button still doesn't work. It must be something from their end. Not cool.

I just tried it again with Firefox and it worked this time. I don't get it.

I agree.

Encountered the same problem yesterday. Never had an issue before with IE. Some reason it acted up yesterday. Downloaded Firefox this morning on advise on one of the GOG member (Titanium) and issue fixed.

I've had that happen to me a couple of times too - but I believe it has something to do with the mouse rather than the browser.

I usually just keep clicking til it works. Of course making sure sure I don't order twice :)