Windows 11 Disable Hibernation File ((hot)) -

powercfg /h off No registry editing, no reboots needed. Your disk space returns instantly. Reducing writes by removing hibernation can also slightly extend SSD lifespan, though modern SSDs handle it fine. The real win is more free space .

She cleaned temporary files, uninstalled old apps, and even ran Disk Cleanup. Still, almost had quietly vanished.

Type:

powercfg /h off Press Enter.

powercfg /h size 20 That would reduce it from 19 GB to ~3.2 GB in her case. Check your hibernation file size if you’re low on disk space in Windows 11. If you never use Hibernate (only Sleep and Shutdown), disable it with: windows 11 disable hibernation file

She had , so Windows reserved roughly 6–8 GB normally — but here it was almost 19 GB . Why? The real issue Hibernation ( hiberfil.sys ) stores everything in RAM to disk so you can shut down and pick up exactly where you left off. But Windows 11 increases that file to up to 40–50% of RAM if Fast Startup (hybrid shutdown) or hibernation is enabled — even if she never used hibernation.

Open Command Prompt as Admin (right-click Start button → Terminal (Admin) → choose Command Prompt). powercfg /h off No registry editing, no reboots needed

powercfg /hibernate size The output showed: Hibernation file size: 40% of total memory (approx. 18.9 GB)