Ps Vita 374 | Firmware Link

The 3.74 update introduced several critical changes to how legacy consoles interact with Sony's services:

Despite the security focus of 3.74, the handheld remains fully exploitable. PS Vita System Software (US) ps vita 374 firmware link

Create a folder named PSVITA on a USB drive, and a subfolder named UPDATE inside it. Place the PSVUPDAT.PUP file in the UPDATE folder. ps vita 374 firmware link