

Double check the CPU is still running at full speed. Without a battery most mopdern laptops will throttle CPU (and maybe GPU) performance.
Also there’s no reason to remove the battery if you can cap it’s charging. 80% is better than 100%, but if it’s plugged in 24/7 cap it as low as it will let you. But 60% is even better than 80% for health. And any cap below 100% severely reduces the chance its battery will expand.



Depends on how much ram you have. 32 or more? Yeah the OS is a drop in the bucket. But even with 8Gb windows kinda chugs sometimes.