Boot.
Four steps, no shortcuts: install Kiln, install official firmware, boot system software, add the games you own.
Install firmware.
Download PS5UPDATE.PUP from Sony's official page, then File → Install Firmware. Official file only — Kiln never hosts it.
◎ At a glance
Reviewed 2026-10-13.
| File | PS5UPDATE.PUP — official, from Sony |
| Menu | File → Install Firmware |
| Hosts it | Sony only — never Kiln |
| Next step | Boot system software |
The only firmware path
- Download PS5UPDATE.PUP from Sony's official PS5 system software page. That page is the source. There is no other source.
- In Kiln, open File then Install Firmware and pick the PUP file.
- Watch the log: [FW] PS5UPDATE.PUP confirms the install started. Wait for it to finish — do not close the window mid-write.
- Next: boot system software.
Official only. No exceptions.
Kiln does not host, bundle, or modify the PUP. It cannot — the file is Sony's, and your install must come from Sony's official page.
No console-modding tools, no key files, no disc-copying guides, no PUP mirrors. Anything offering firmware outside Sony's page is a trap.
If the PUP fails to install, re-download it from Sony. A truncated download is the usual cause — check the file size against Sony's page.
What firmware does
The PUP is the console's own system software. Kiln installs it the way RPCS3, shadPS4, and Kyty-style emulators do: user-supplied, official, unmodified.
After install, Boot system software brings up the PS5 home. That booted state is what games launch from.
Glossary version: firmware PUP.
Questions
Where do I get PS5UPDATE.PUP?
From Sony's official PS5 system software page. Kiln never hosts or bundles it — download it yourself, then File then Install Firmware.
Can I use a PUP from another site?
No. Official file from Sony's page only. Third-party PUPs are untrusted and often broken or malicious.
Install fails halfway. What now?
Re-download the PUP from Sony — truncated downloads are the usual cause. Then run File then Install Firmware again.
Related
Boot system software.
Firmware installed? Press Boot system software. The log confirms [BOOT] and the PS5 home comes up.
Firmware PUP.
PS5UPDATE.PUP is Sony's official system software. You get it from Sony, Kiln installs it, games boot from it.
Windows installer.
One setup file, 64-bit Windows 10 or 11. The installer gives you the emulator and the launcher — nothing else.
Do I need the games.
Yes. Kiln ships zero games and explains zero ways to get them. You run the library you already own.
Windows installer · 400+ titles in the launcher
Get the launcher.
Install Firmware with your own PS5UPDATE.PUP, boot the system software, then start a game you own.