If your PS Vita is running , you should exercise caution.

There are three main ways to update your PS Vita or PS TV to the latest firmware. 1. Update via Wi-Fi (Easiest)

: Updating to 3.74 will typically remove an existing jailbreak. Recommended Workaround

According to Sony's release notes, system software version 3.74 includes general system stability improvements and bug fixes.

suggest spoofing your version to 3.74 in Henkaku settings rather than performing a full official update if you wish to maintain custom firmware while staying online. Device Setup Password to sign back into your account after the update? PS Vita System Software (US)

You can update your system using one of the following official methods: System Update Update Using Wi-Fi PC Connection : Install the Content Manager Assistant on your computer, connect your Vita via USB, and select Update by Connecting to a PC in the System Update menu. PS3 Connection