You are using tools like modoru to downgrade your firmware to 3.60 or 3.65 (the "golden" firmwares for homebrew) and need the specific version file. How to Install Firmware via PC (Manual Method)
Your device cannot connect to a stable network.
Place the psp2updat.pup file into the "Updates" folder designated in your QCMA settings. Safe Mode Update: Turn off your PS Vita.
Since Sony’s official Content Manager Assistant (CMA) is often buggy on modern Windows/Mac systems, the community-created QCMA is highly recommended.
Using a standard MicroSD card instead of Sony’s expensive proprietary cards. Custom Themes: Personalized UI layouts.
The name follows Sony’s specific naming convention for the PlayStation Vita (codenamed "PSP2" during development). While the original PSP used EBOOT.PBP for updates and the PS3/PS4 use PS3UPDAT.PUP , the Vita utilizes the .PUP (PlayStation Update Package) extension.
Running RetroArch or backing up physical game cartridges.