I disabled Fast Startup because Windows never really shuts down, and that explains a lot of strange bugs

Published Aug 19, 2026, 9:00 AM EDT Abhishek is an author at XDA who covers computing. He has loved computers since he got the Lenovo G570 in 2012. Abhishek holds a master's degree in computer applications and began his writing career in 2018. He loves writing how-to articles, listicles, and informational posts on popular operating systems and web services. He closely follows the Windows Insider program and tests new Insider builds to discover upcoming experimental features and upgrades. His past work includes long-term collaborations with reputed publications like Tom's Hardware, and Windows Latest. When not writing anything, he is busy watching new episodes of One Piece or searching for something binge-worthy. Windows features try to improve the user experience and save you from unexpected problems. System Restore is a great example of an OS tool that comes in handy when you install problematic software or updates. You can roll back to an earlier, workable state with the help of the WinRE page. But not all Windows features are helpful, and the OS enables some of them without your discretion. Fast Startup is one such controversial feature that arrived with Windows 8 and has frustrated many users. I have faced quite a few problems with Fast Startup and keep the feature disabled on every fresh Windows installation. Let’s discuss how it affects system shutdown and whether you should let it control your system state. Fast Startup exists for a reason Reducing the boot time As someone who witnessed the transition from HDDs to SSDs, storage has come a long way. Now you have SATA drives, USB drives, and NVMe drives, each offering faster I/O with each new generation. I remember using Windows 7 on my first laptop, and I wanted the OS to boot as fast as it could. To achieve that, I used to micromanage startup apps and services and reduce every possible roadblock. Back then, booting to the desktop in a minute on an HDD was impressive. Microsoft introduced Fast Startup as a remedy to this problem, and I did notice some improvements when my laptop’s primary storage was a 2.5-inch SATA HDD. But how could an OS suddenly boot so fast, even on older storage? Well, Windows uses an old trick for it, packaged as a new feature. Fast startup writes the present kernel state to the hibernation file and then references it when you power on your system after a shutdown. Since the OS doesn't have to load a fresh kernel state and can access the previously initialized state inside the hibernation file, your PC boots faster to the desktop. But isn't hibernation a complete preservation of the system state? Yes, it is, but Fast Startup doesn't try to save everything and focuses only on the kernel session and loaded kernel-mode drivers. A traditional hibernation command saves everything, including open apps, along with what Fast Startup tries to preserve. Since Windows needs to initialize the kernel and drivers every time it powers up, saving this state lets Windows jump directly to the lock screen. So, why is it so controversial? Preserving the system state can invite new challenges Compromising stability for speed While I'm absolutely down with doing anything to load the OS faster, it shouldn't come at the expense of system stability. Preserving the partial system state might shave off a few seconds of boot time, but if it starts breaking other features, I can't keep using it. If a kernel-mode driver encounters a glitch, restarting Windows can fix it because the action forces the OS to create a fresh kernel session. Microsoft enables the feature by default on systems that support hibernation (usually laptops). So, clicking the shutdown option in the Start menu or pressing the power button tells your PC to actually perform a special type of hibernation instead of a complete shutdown. It’s easy to see how Fast Startup can unintentionally invite issues that a standard shutdown or restart would otherwise clear. A fresh start isn't bad for kernel-mode drivers and hardware initialization. When you power on your PC, it performs a series of checks and loads drivers for every component so that you can use it (like the GPU or Wi-Fi). But if Fast Startup saves a bad state of these kernel-mode drivers, your PC will encounter a loop of problems. No matter how many times you shut down and start your PC, Windows will keep restoring the same kernel state and kernel-mode drivers. So what? Can’t you just restart and fix these problems? How difficult is it to click the Restart button? Kernel-mode drivers are not the only problem. Your PC needs a full shutdown or restart to apply or manage driver updates, hardware changes, and more. Windows has had an update and shutdown button bug for many years, which Microsoft fixed with a patch a few months back. Users also complain about infuriating issues with dual-booting another OS due to Fast Startup. The feature prevents you from accessing shared NTFS storage drives because Linux cannot work with a volume that Windows left in a hibernated state. If that happens, you might notice that the shared storage drive either appears in a read-only state or doesn’t mount at all. Ditch Fast Startup? Depends on your storage The feature surely sounds problematic, so why bother keeping it? I personally turned it off on my main PC and one other system running Windows 11 because I don’t need the speed. Both systems have an SSD (one uses a SATA SSD and the other uses a PCIe NVMe SSD), which delivers great I/O speed, and I don’t find the boot time to be a huge issue. If you have either of these SSDs as the primary OS drive, you don’t need the insignificant boost the feature offers. Also, if you dual-boot, Fast Startup can induce problems with shared storage, which is a compelling reason to ditch it. However, if you have a Windows 10 or 11 system with an HDD, the feature shows a noticeable reduction in boot times. But you must do occasional full shutdowns or restarts to break the cycle, discard the existing kernel state, and give Windows a fresh start. There’s also an option to do a complete shutdown with the shutdown /s /f /t 0 command if certain firmware updates fail to apply. Fast startup has a niche scope Fast Startup has been one of my most ignored OS features. Whenever I’m concerned about faster boot times and saving system state, especially when doing tasks like a video edit or a draft finalization, hibernation is reliable. Disabling Fast Startup reduces my troubleshooting, and even on older systems, occasional hibernation is better. Lastly, we should stop bickering over OS boot times unless the PC takes an unbearable amount of time to reach the lock screen. Windows 11 Pro A USB installation drive and license key for Windows 11 Pro, with additional features like Hyper-V and Windows Sandbox support.