E4VX Emulator is the best emulator in which you can play all these games, like Free Fire and Pubg Mobile. This emulator is a light version of BlueStacks, and it is specially made for mid-range and low-end PCs. Now you also know that BlueStacks. It is impossible to run a low PC. If you have a heavy PC, BlueStacks still freezes, so the solution is to use the E4VX Emulator. It is quite stable and optimized. Run for your old computer
E4VX EMULATOR LAG Fix
Now if you use E4VX Emulator, then you might get lag in its game because it has some settings; only when you do this setting will it run stable in your system. Do not use Google Play Store because this emulator is stuck in Google Play Store. If you have to use the Google Play Store, you can install any app you want to install from Google Play Store, and After that, you can disable this Google Play Store For a complete tutorial, you can watch this video