My RPi 2 keeps freezing when running RISCOS for about an hour at a time. The RISOC OS 5.21 version was installed with Noobs 2.4.0. I have tried replacing the mouse and keyboard in case it was an I/O problem. I have tried replacing the SD card and reflashing with RISCOS again. I have even swapped the Raspberry Pi 2 for a second previously unused Raspberry Pi 2.
None of these steps have prevented the device(s) from freezing.
Any ideas appreciated as I am not sure what to try next.