Sony no longer actively hosts PS Vita firmware on its main consumer websites. The official update endpoint (via http://fus01.psvita.update.playstation.net ) still works but only serves the (3.74 as of this writing). However, if you need:
If you are following a specific CFW guide that requires you to manually inject a PUP file, you generally have two sources: psp2updatpup new download
over the official Sony tool because it allows for "Offline Mode," which prevents the system from forcing a newer update than the one you intended to install. Initiate Update: Connect your Vita to the PC via USB, go to Settings > System Update , and select Update by Connecting to a PC Updating PS TV via USB PS Vita System Software (US) Sony no longer actively hosts PS Vita firmware