Please Help Me, My Copy of GTA 4 is lagging

I have a Windows 7 Home Premium with a 600 GB RAM , 64 bit operating system with an intel i5 processor. Everything works just fine until the actual game loads and it's incredibly laggy and quite a jarring experience. Any help and advice would be appreciated. I have tried going to properties and configuring it for earlier OSes but that hasn't worked either.

System Configuration: Windows / Chrome 81.0.4044.138