werewolfex7: im useing a windows 10 laptop my problem is with dont starve will load but wont play and my majesty wont stop makeing the map mess up and the kings quest mask of enternity wont even play with there all great games that i would love to play
X-com: Are you using the GOG Galaxy client? Also found a note about Kings Quest 8 on the game page: Compatibility notice: King's Quest 8 is incompatible with Intel video devices, such as those installed in netbooks.
Here is a thread about Majesty:
https://www.gog.com/forum/majesty_series/windows_10_support Apparently "It seems that enabling lagacy DirectPlay did fix the issue for me, game is working, except for intro video." as stated by one user.
I'm not sure what's up with Don't Starve, I know it's not that old so there must be something going on. As for the others, quite a few old games don't seem to be compatible with Win 10 yet.
Only thing I can suggest is to contact support to get a refund or credit to buy something else because you didn't know about these issues, can't guarantee that they will fulfill the request though.