Microsoft Fixes SSD and HDD Write Speed Bug in Windows 11 – Tom's Hardware

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An issue that’s taken Microsoft several months to finally fix
Microsoft is finally addressing major performance issues with SSDs and hard drives in a new Windows Preview Update KB5007262 for Windows 11. The update fixes severe write speed issues caused only on the C drive due to the enabling of the NTFS USN journal.
According to MSPowerUser, the C drive write speed issues have been a Windows 11 problem for months, with Windows Insiders complaining about the issues well before the operating system’s release.
The issue is quite severe, where write speeds on the C drive are cut in half from this bug alone. However, read speeds are unaffected for unknown reasons. For instance, on a Samsung 980 Pro SSD, a user from MSPowerUser reported that random write speeds went from 1601 MBps on Windows 10 down to 911 MBps with Windows 11.
Samsung 980 Pro Write Speed Bug in Windows 11
So thankfully, Microsoft has finally addressed the write speed glitch in update KB5007262, but that’s not all this update has to offer. This new update also provides an eye-watering amount of bug fixes and improvements to Windows 11. Here are the most prominent ones to name:
For more details, be sure to check out Microsoft’s blog post here.
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