The 3.74 update introduced several critical changes to how legacy consoles interact with Sony's services:
: Traditional PSN passwords no longer work for logging in on a Vita. You must generate a "Device Setup Password" via your account settings on a PC or mobile browser. ps vita 374 firmware link
Hold the power button for 7 seconds to enter Safe Mode and select . Jailbreak and Custom Firmware (CFW) Status ps vita 374 firmware link
: This update removed the ability to transfer content between a PS3 and a PS Vita via a USB cable. How to Install the 3.74 Firmware Update There are three primary ways to update your system: ps vita 374 firmware link