If you're trying to update your PSVita, here are the steps you can follow:
: When sourced directly from Sony's official servers, the file is 100% reliable. However, because Sony has ended prominent support for the PS TV, finding the direct download link on their official site can sometimes be difficult, leading users to third-party mirrors. Security Risk High Caution Advised. Psvupdat.pup Download
No. Antivirus software does not catch 100% of threats. If the source was not playstation.com or the official Sony domain, delete the file immediately. Do not open or run it. If you're trying to update your PSVita, here
If your Vita can't connect to Wi-Fi, you can update it via a PC or USB drive. Emulator Setup: Modern emulators like Q3: I downloaded Psvupdat