Firmware Link: Ps Vita 374
: Signing into the PlayStation Network now requires a device-specific password and two-factor authentication (2FA).
Download and install the on your Windows or Mac computer . Connect your Vita to the PC via USB. ps vita 374 firmware link
Right-click and "save as" the Official 3.74 Update Link to download the PSVUPDAT.PUP file. : Signing into the PlayStation Network now requires
This usually happens if the download was interrupted. Re-download the file from a different mirror. Ensure you are unzipping the file correctly if it comes in a .zip format. ps vita 374 firmware link
Select > Update from USB Storage Device . Key Changes in Firmware 3.74