Why your PS5 won't update system software & how to fix it!.. If your Playstation 5 stopped updating software or has error when system software is performing the update, this is what to do! Fist, I recommend updating your PS5 using a LAN cable ethernet connection. Doing this can help with problems downloading Playstation software updates. Next you can try forcing the PS5 to perform the system update in the settings menu. If that doesn't work, you can use the Safe Mode feature on Playstation 5 and update the software with Internet connection or USB. Doing this should fix the problem if your PS5 won't update.