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How to Downgrade 3.51 Firmware

The 3.51 firmware strengthens the security of your Sony's PSP software and games. However, you may have trouble using the firmware with your Sony PSP. It could slow down the performance of your Sony's PSP device or games. Alternatively, it could crash or freeze your Sony PSP software. If you encounter any of these problems with the update, you still have the option to downgrade the PSP firmware to your Sony. First, you need to remove the firmware to downgrade to an earlier version.

Things You'll Need

Memory stick duo (from your Sony PSP)

Instructions

- 1
  Attach the memory stick duo to an available USB port on your computer. Click "Start" and "Computer." Double click your Sony PSP software.
- 2
  Click "System Settings" and "System Information." Locate and click 3.51 firmware to remove it.
- 3
  Navigate to a website that has a list of PSP updates. Downgrade to the next version of Sony's PSP. Save the file to your desktop for easy access.
- 4
  Double click the file. Follow the setup wizard instructions for installing the software. Click "I Agree" to agree to the terms and conditions.
- 5
  Save the software to your computer's hard drive. Select "Typical Install" from the options to install all the components of the PSP software.
- 6
  Restart your computer. This lets your computer recognize the newly installed software.
- 7
  Right click and copy the firmware, located on your desktop. Click "Start" and "Computer." Double click your Sony PSP's folder. Right click and select "Paste." The firmware will automatically install to your Sony PSP.

Sony PSP