What title says, game loads and credits start, it minimizes but keeps playing, i go back into the game and make it to main menu but it keeps alt tabbing litteraly every second, making gameplay impossible.

The funny thing is the first time I ran BGII it worked fine, after reinstalling it several times I can safely say there is no problems the first time it's launched after installation.
It's the following times that the problem happens.

I thought maybe it was me using mods that messed it, but nope after several vanilla reinstallations problem still persists.

Cheers in advance for any help

I had the same problem in Win 7. I solved it by right clicking on the shortcut that starts the game (I use a desktop one), select properties, go to the tab "compability" and check the boxes "Disable visual themes" and "Disable desktop composition". This makes Win 7 turn off some graphic gimicks while the game is running, and re-enable them when the game ends.

^ It solved the problem, cheers very much :)

If anyone is having the same problem on Windows 10 the solution is almost the same. The difference is in 'Compatibility' settings go to 'Change high DPI settings' and check 'Override high DPI scaling behavior' and choose application.