If the Windows Explorer on your Windows computer is crashing frequently, you may check a few solutions that might work for you in this previous post - Fix: How to solve Windows Explorer frequent crashes in Windows 10 ?
If none of the solutions work, then you may apply this workaround, that is to launch folder Windows in separate process so that even if Windows Explorer crashed, the folder windows already open stays as it is.
If none of the solutions work, then you may apply this workaround, that is to launch folder Windows in separate process so that even if Windows Explorer crashed, the folder windows already open stays as it is.