Use a known-good USB cable (the P620 uses a standard USB Mini-B). Wait 10 seconds.

While unlikely to work for the ICD-P series, you can attempt these if you want to avoid the audio cable method: Virtual Machine

The may not exist officially, but that does not mean your recorder is obsolete. By using compatibility modes, generic Sony drivers, or simply a USB card reader, you can continue to transfer and manage your voice recordings without upgrading your hardware.

Sony Icd-p620 Driver Windows 10 'link'

Use a known-good USB cable (the P620 uses a standard USB Mini-B). Wait 10 seconds.

While unlikely to work for the ICD-P series, you can attempt these if you want to avoid the audio cable method: Virtual Machine sony icd-p620 driver windows 10