I'd like to start off by saying I have also got GTA SA which runs fine, and I have tried running GTA 3 in different compatibility mode.
There's two problems I have.
I'll start with the first one, whenever I use my touchpad/mouse to move the camera, the game just does a small freeze everytime I touch it, since I use it all the time the game is extremely laggy and it's annoying.
The only way I can fix it is by turning off frame limiter, which leads to another problem.
Claude randomly loses health and flys across the road when I have this on, having him killed or a huge loss of health, it's annoying, especially when it happens unexpectedly.
If anyone can help me with either of these two problems I'd be very greatful.
I don't seeing the specs as relevent but I put it here anyway.
Processor: Intel® Core i3-4030U CPU @ 1.90GHz (4 CPUs), ~1.9GHz