I disabled Fast Startup because Windows never really shuts down, and that explains a lot of strange bugs
xda-developers.com/windows-never-really-shuts-down-because-of-fast-startup/
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Fast Startup May Worsen Windows ProblemsWindows Fast Startup shortens boot times but can interfere with updates, hardware checks, and dual-boot access.
Key FactsAug 19, 2026 · Reading time: ~30 sec.
Summary created with AI assistance · Source: xda-developers.com
Summary created with AI assistance · Source: xda-developers.com
- Microsoft introduced Fast Startup with Windows 8; the feature stores the kernel state and loaded kernel-mode drivers in the hibernation file and is enabled by default on systems that support hibernation.
- A faulty saved state can persist across multiple shutdowns, while a restart or full shutdown creates a fresh kernel state and may be required for driver updates and hardware changes.
- In a dual-boot setup, Fast Startup can prevent Linux from accessing shared NTFS drives, which may then appear read-only or fail to mount.
- The author recommends disabling Fast Startup on systems with SATA or PCIe NVMe SSDs, while it can noticeably reduce boot times on Windows 10 or Windows 11 computers with HDDs.
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Key FactsClaude Analyzes Windows 11 Event Logs
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Summary created with AI assistance · Source: xda-developers.com
Summary created with AI assistance · Source: xda-developers.com
- The author exported 30 days of system logs containing about 750 critical, error, and warning events to Claude Sonnet 5.5.
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I disabled Fast Startup because Windows never really shuts down, and that explains a lot of strange bugs
xda-developers.com/windows-never-really-shuts-down-because-of-fast-startup/
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Key FactsWindows Fast Startup causes avoidable SSD writes
Aug 19, 2026 · Reading time: ~45 sec.
Summary created with AI assistance · Source: xda-developers.com
Summary created with AI assistance · Source: xda-developers.com
- With Fast Startup enabled, Windows creates a compressed snapshot of the kernel and drivers during shutdown and stores it as hiberfil.sys on the boot drive.
- On the system described, hiberfil.sys occupied 12.5GB, while hiberfil.sys and pagefile.sys together used 24GB of storage.
- Repeated writes can contribute to drive wear over its working life, and an SSD with little free space may be affected more because of higher write amplification.
- Fast Startup can be disabled through Power Options, while powercfg /h off deletes hiberfil.sys and powercfg /h on reverses the change, but laptops then lose automatic hibernation protection if the battery runs out.
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