You can no longer log in using your standard PSN password. You must generate a "Device Setup Password" from your Sony account settings on a PC or mobile browser to sign in.
This usually occurs during a failed download. Ensure your Wi-Fi is stable or try the manual PC update method.
Whether you want to keep your console purely official or open it up to a world of homebrew, firmware 3.74 is the current baseline standard. Always use official update links to preserve your hardware, and ensure you use a Device Setup Password on your PC or smartphone if you intend to log back into the PlayStation Network on your Vita. ps vita 374 firmware link
: Official firmware information for Canada. Update Procedures
Since version 3.74, Sony has disabled account creation and some management features directly on the Vita. Device Setup Password: You can no longer log in using your standard PSN password
Despite the security focus of 3.74, the handheld remains fully exploitable. PS Vita System Software (US)
Whether you are updating to maintain network access, troubleshooting a system error, or preparing for a custom firmware installation, this guide provides the necessary and all related information. What is PS Vita Firmware 3.74? Ensure your Wi-Fi is stable or try the
Disabled new account registration directly on the Vita hardware. System Stability: Minor internal performance tweaks. Official PS Vita 3.74 Firmware Download Links
Sony provides several official ways to update your console to 3.74: Direct Update via Wi-Fi System Update Update using Wi-Fi
Open Content Manager on your Vita, select "Update System Software," and choose "Update by Connecting to a PC." A Note on Homebrew and Jailbreaking