powercfg -h on This recreates the file with the default size (approx. 40–75% of RAM). To set a (e.g., for Fast Startup only):
powercfg -h -size 60 This limits the file to 60% of RAM – enough for Fast Startup but not for full hibernation. | RAM Size | Default hiberfil.sys size | Space recovered after disable | |----------|---------------------------|-------------------------------| | 8 GB | ~3.2 – 6 GB | ~3–6 GB | | 16 GB | ~6.4 – 12 GB | ~6–12 GB | | 32 GB | ~12.8 – 24 GB | ~13–24 GB | disable hiberfil sys
powercfg /availablesleepstates Or check hibernation status: powercfg -h on This recreates the file with
dir C:\hiberfil.sys /a You should see: File Not Found | RAM Size | Default hiberfil
powercfg -h -size 50 (Value is percentage of total RAM, from 40 to 100.) If you need Fast Startup but want to reduce space, you can set a smaller hibernation file:
Alternatively, verify in File Explorer (with hidden & protected OS files visible) – the file should be absent. To restore hiberfil.sys and hibernation functionality: