A PS Vita (Fat 1000 model or Slim 2000 model) running official firmware 3.74.
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If the console says you are already up to date but you aren't on 3.74, try clearing your Wi-Fi DNS settings. Method 2: Manual Update (USB/PC) If you cannot connect via Wi-Fi, you can use the Content Manager Assistant (CMA) or a USB drive (for PS TV). PlayStation For PS Vita: Download and install the Content Manager Assistant on your PC or Mac. Connect your Vita to the computer via USB cable. System Update Update by Connecting to a PC For PS TV (USB Drive): Format a USB drive to Create a folder named on the root, and inside that, a folder named Download the official PSVUPDAT.PUP file from the PlayStation Support site and save it in the A PS Vita (Fat 1000 model or Slim
Ultimate PS Vita Firmware 3.74 Download & Custom Firmware Guide Method 2: Manual Update (USB/PC) If you cannot