Yvelika: message that 'the configuration registry database is corrupt' and error code 0x800703F1' . Thats the message i get every time. I have installed, re-installed etc many times, turned off the anti virus etc but to no avail. I will try installing the game outside of the programs like you suggest.
You could try a refresh (which won't nuke your files.). Instructions here:
https://www.tenforums.com/tutorials/4090-refresh-windows-10-a.html **EDIT** ACK! Apologies. I see you tried that very thing (sorry, I'm posting from work, so a bit distracted). **EDIT**
Yvelika: I'm not sure about a key as my game does not ask for a key. Never has. I bought it kosher in a shop, so it's not a copy, all original.
No, I meant the GOG version. I can give you a key to redeem here on GOG and you could try to install GOG's non-CD version of the game. But...
Yvelika: I think the problem is something do do with windows 10 updates and as that's all automatic now I am at a loss as to what to do next. Thanks for your help :-)
It appears you actually have an issue with your Windows registry, which will likely mean the GOG version of BG isn't going to work either. I'd suggest getting that fixed, as it may cause you issue with other things down the road. Anyway, give a look at the link I posted above and see if you think that's something you can do. It may fix your issue - hopefully without too many repercussions.