Windows 11 drive slowdown bug is finally fixed (but apparently not for everyone)

Windows 11 running on a laptop
(Image credit: Microsoft)

Windows 11 has received a new cumulative update which applies some important fixes, including patching up some File Explorer problems, and tackling the big SSD and hard drive slowdown bugbear which has been looming over the OS for a long time now (at least, in theory the patch deals with it – more on that later).

Update KB5008215 has been released for Patch Tuesday and brings with it the new emoji previously seen in testing (including Clippy replacing the paperclip), along with a whole bunch of bug fixes, most of which were already present in November’s preview update.

That includes solutions for Bluetooth audio volume problems, and various glitches with File Explorer such as it crashing after closing a window, and problems with displaying shortcut menus.

The big fix, though, is the cure for the gremlin causing sluggish drive speeds for some users. As Microsoft notes, the patch “addresses an issue that affects the performance of all disks (NVMe, SSD, hard disk) on Windows 11 by performing unnecessary actions each time a write operation occurs”.

Those write slowdowns can cut drive speeds in half, or worse, going by previous reports, so this is a major spanner in the storage works, and it’s good to see the fix go live.

Windows Latest reports that the cumulative update fixes these drive-related problems in its experience, but on a cautionary note, we have seen a few reports on the likes of Reddit from users who say their drive is still slower than it should be under Windows 11, even after applying KB5008215. There are also satisfied users commenting on those threads, too, saying their performance has been improved after the update.


Analysis: New patch is a positive step forward, but there are still concerns here

The fix for the driver issue is obviously an important one, as the performance reduction is huge in some reported cases, which hardly puts the new operating system in a good light. While this patch seems to fix things for a good number of Windows 11 users affected by sluggish drive performance, there are folks out there reporting that it didn’t do them any good; and that must remain a concern.

The drive slowdown bug is an issue which has been around for a good while now, indeed it surfaced a few months ago before Windows 11 was even released, and this – plus some scattered reports of it still not being cured now, with the fix applied – clearly point to it being a seriously thorny problem.

Hopefully Microsoft will be able to finalize any fresh tweaks that need to be done soon enough, but given that the holidays are almost here, the software giant won’t be putting out a preview update late in December. In other words, it won’t be until January that we see any further movement on this issue.

Obviously it’s also useful to see some File Explorer issues cleared up as well, but it’s another point of concern exactly how much has gone wrong with these fundamental building blocks of the desktop on Windows 11, all adding to the perception of the OS having been released a bit too early.

Darren is a freelancer writing news and features for TechRadar (and occasionally T3) across a broad range of computing topics including CPUs, GPUs, various other hardware, VPNs, antivirus and more. He has written about tech for the best part of three decades, and writes books in his spare time (his debut novel - 'I Know What You Did Last Supper' - was published by Hachette UK in 2013).

Read more
Woman gaming on a computer at home
Microsoft finally fixes some of Windows 11’s most annoying problems with new patch
Angry businessman destroying his desk and laptop with a baseball bat
New patch for Windows 11 24H2 reportedly plays havoc with File Explorer, and some folks are claiming it's broken their PC
Angry business man screaming on laptop
Finding Windows 11 sluggish when you’re working with files and folders? You’re not alone – and it’s high time for Microsoft to sort out File Explorer
Man having Windows 11 problems with his laptop
Fed up of adverts creeping into Windows 11? You won’t like Microsoft’s latest update, then, although it does provide some important bug fixes
A man sitting at his computer desk on his desktop with his head in his hands, looking a little frustrated.
Windows 11 suffers more bugs in latest update, with the Start menu hit hard by some frustrating issues
A man getting angry with his laptop.
Windows 11 bug deletes Copilot from the OS – is this the first glitch ever some users will be happy to encounter?
Latest in Windows
A woman sitting in a chair looking at a Windows 11 laptop
Microsoft is supercharging Windows 11’s voice commands on Copilot+ PCs with Snapdragon CPUs, and fine-tuning a few Recall features
A man getting angry with his laptop.
Windows 11 bug deletes Copilot from the OS – is this the first glitch ever some users will be happy to encounter?
Printer
No, your printer isn't possessed: a Windows 11 23H2 bug could be making it print random characters when connected via USB
Man having Windows 11 problems with his laptop
Fed up of adverts creeping into Windows 11? You won’t like Microsoft’s latest update, then, although it does provide some important bug fixes
Acer Aspire 14 AI laptop display showing the Windows 11 login screen
Shock, horror – I’m not going to argue with Microsoft’s latest bit of nagging in Windows 11, as this pop-up is justified
A laptop on a desk with the Windows 11 background on its screen.
Microsoft is adding image editing and compression to its Windows Share feature - and I couldn't be happier
Latest in News
Garmin Instinct 3
A new Garmin study hints at the link between burning calories and happiness, and I've got good and bad news
A woman sitting in a chair looking at a Windows 11 laptop
Microsoft is supercharging Windows 11’s voice commands on Copilot+ PCs with Snapdragon CPUs, and fine-tuning a few Recall features
MacBook Air M4
Apple's rumored foldable iPad tipped to launch sooner than expected with an exciting software twist
A phone displaying the Google Messages logo
Google Messages could finally be getting this WhatsApp-style group chat feature
The Future Games Show Spring Showcase
The Future Games Show returns this week for its Spring Showcase, here's how to watch and what games to expect
NordProtect logo
Standalone identity theft protection from Nord Security is now available