powercfg /a Execute:
1. Overview hiberfil.sys is a system file created by Windows to support the Hibernation feature. When a computer hibernates, the entire contents of RAM (including open documents, running applications, and system state) are written to this file. Upon waking, the system reads the file back into memory, restoring the exact pre-hibernation state. disable hiberfil sys
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 /a Execute: 1
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: Upon waking, the system reads the file back
dir C:\hiberfil.sys /a You should see: File Not Found
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 |
powercfg /availablesleepstates Or check hibernation status:
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