Hold the power button for 7 seconds to enter Safe Mode and select . Jailbreak and Custom Firmware (CFW) Status
: Go to Settings > Start > System Update > Update Using Wi-Fi .
For those looking for archival copies or specific MD5 hashes for verification, Darthsternie’s PS Vita Firmwares and the Internet Archive also host the 3.74 firmware files. Key Changes in Firmware 3.74 ps vita 374 firmware link
: You can no longer create a new PSN account or manage certain account details directly from the Vita.
Despite the security focus of 3.74, the handheld remains fully exploitable. PS Vita System Software (US) Hold the power button for 7 seconds to
You can download the official update file (PSVUPDAT.PUP) directly from Sony's regional support pages. To download, right-click the "Download Now" link on these pages and select : PlayStation US Support - PS Vita System Software PlayStation UK Support - PS Vita System Software PlayStation Canada Support - PS Vita System Software
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. Key Changes in Firmware 3
: 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.