I followed your instructions, and it did no improvement. That account still has an error in the app event log when trying to start the Grammarly application. It starts if done in the first few minutes. Quitting and starting it back works, then, about 5 minutes later, it generates this when trying to start it:
Faulting application name: Grammarly.Desktop.exe, version: 1.2.126.1580, time stamp: 0xa07d9963
Faulting module name: KERNELBASE.dll, version: 10.0.22621.4751, time stamp: 0x2db246bf
Exception code: 0xc06d007e
Fault offset: 0x000000000005fb4c