Yep, same problem, Enhanced version, cursor keeps disappearing but changing the video settings to 4:3 seems to have fixed it. Still, if you're going to launch an enhanced version of a classic game like this and claim it has better HD graphics support/options and you literally can't click anything in a game where even the Orcs giggle if you click them too much, don't screw up the clickability, right GOG?

It's a mix.
Or do you belive gold old games (they thont use it now days) whuld let Blizz lounch a game that whas bad from start?
Feells like we are bete. c testers

Edit:
Clerifikation
So GOG have nothing to do how and, what game they relese?
So its not a joint operation?

Same here, mouse ia laggy and sometimes disapears. 1920 x 1200 with Nvidia card, enhanced wow II version.

The mouse issue is one of the things related to the scaling issue. Which is done through the control panel of your GPU. This is NVidia solution. (N.B: Scaling also improve quality on many modern games)

V CLICK ATTACHMENT TO SEE IMAGE IN NEW TAB V

This is caused by the GoG video settings being something larger than 640x480. It's not that the mouse isnt there, it's that it's so far off the screen that you cant see it. If you move the mouse far enough to the left you'll eventually see it. You can fix this by making sure all the video settings are set to "Default".

It's G-Sync. At least, in my case it was. I disabled G-Sync to play, and issues were resolved. Noticed when moving my cursor quickly my display's framerate was sticking at 15hz (to match in game FPS).