Anyone old enough to be messing with PCs in the early to mid-2000s probably has the following burned into their mind: FCKGW-RHQQ2-YXRKT-8TG6W-2B7Q8. That's neither a magic spell nor a password for a cabal — it's the best-known Windows XP key, letting anyone install and run the operating system with its incantation and just the one CD. Ever wondered how or why Microsoft let such an apparent gaping hole in its copy protection? Former engineer Dave Plummer explained in an X post.

First off, there were actually two versions of the original Windows XP media: Retail and Volume. The former was for anyone who just bought the OS off the shelf, while the latter was reserved for Microsoft partners and OEMs that needed to easily install it on thousands of machines without needing to individually activate every single one at install time.

Retail and Volume media had different keys, too, and the installer would validate the key you input against specific data on the disk, "encrypted so hard that even today it hasn't been decrypted [...]" (Someone will take those words as a challenge). The magical piece of cryptic data was nothing other than the whole 10 MB of... Microsoft Bob. The short-lived assistant was technically the antecessor of the much-maligned and memed-upon Clippy, and did its best in 1995 to introduce newbies to basic computing tasks.

Regular Joes and Janes weren't supposed to be anywhere within a stone's throw of a Volume disc, though, as those were strictly enterprise-only. The final version of the CD, called Release to Manufacturing, or RTM, was complete in August 24, 2001 — two months before the official launch on October 25. The discs were available to OEMs and partners before the release date so those companies could have their wares ready with Windows XP on them.

Plummer notes that "very few" organizations had access to the Volume image and the corresponding Volume License Key (VLK) and believes that someone at a major OEM, potentially Dell or Intel, leaked the Volume media and the key together before the official release. The pirate group Devils0wn then quickly spread it online for everyone to enjoy

Later on, when Service Pack 1 arrived, the FCKGW key was among the 640 blacklisted from the operating system due to leakage. Service Pack 2 and its Windows Genuine Advantage checks went a couple steps further and blocked updates entirely on machines with a blacklisted VLK. Plummer states that Microsoft didn't want to cause unnecessary trouble for customers, hence its laissez-faire attitude and choice to stick to just blacklisting affected keys.

Many theories over the years proposed that the FCKGW key worked because Microsoft's key generation algorithm was very basic, a notion outright dismissed by Plummer. He plainly states that algorithm was written by "ACTUALLY smart guys with heads so big that they bumped the doorjamb on the way into your office."

The truth of the situation was far simpler: as is usual with computing, ultimately the problem was between the keyboard and the chair. It's a good a time as any to reminisce about that compact disk you totally don't have on a bookshelf somewhere with the FCKGW key written on it with a Sharpie.

Microsoft has issued an out-of-band update for its recent Windows 11 patch, which has caused a number of bugs and issues. The September 2026 update was just released last Tuesday, and although it packs a number of new features and fixes nearly 1000 security flaws (commonplace in this day and age), there are also a few unfortunate regressions.

The 25H2 update finally reintroduces a movable taskbar, just like we've had since Windows 95, with an option to make the height smaller for compact displays. Likewise, the Start menu now has multiple configurable layouts, and you can toggle each main section on or off. Microsoft also revamped Windows Search — perhaps to finally be useful — and users can now choose to only have it display local results. Explorer got a handy tweak in the form of using KB, MB, GB size indicators, as well.

The update has also surfaced some serious bugs. First off, PCs with AMD Radeon GPUs are crashing, apparently due to the update provoking driver instability. Reinstalling the driver doesn't appear to help, and the reports unfortunately cover most contemporary AMD graphics cards. Microsoft did not mention AMD GPUs specifically in its latest update.

Microsoft noted that it has fixed an issue with Remote Desktop Services where RDS might become unstable, causing connection and sign-in failures.

Microsoft is also aware of an issue with audio output and microphone input going dead. Additionally, there are seemingly reports of audio devices starting up with a botched configuration, like tweaked 3D audio settings or speaker setups. The apparent workaround seems to be putting audio in a standard 2.0 configuration, but Microsoft has now addressed this issue in the emergency patch.

Explorer may display a black screen after logging in, leaving you with a perfectly functioning operating system but no visible UI. The File History backup feature is reportedly not detecting external drives, effectively making it useless. Of particular concern to enterprises, systems administrators, and homelabs, the Remote Desktop Service is also experiencing issues. Last but not least, Microsoft says it has addressed an issue where Claude Cowork is nonfunctional due to the update breaking HC-managed Linux VMs with Plan9 shared folders

Owners of HP and Lenovo systems are also advised to consider holding off on this update. Ever since the August 2026 patch (and now, cumulatively, with the September update), there are reportedly serious issues on both camps. On the HP side, there are instances of the update triggering BIOS corruption, leading to a failed install with no ability to recover the OS — though seemingly the OEM has published a new BIOS revision, so it's hard to say which side is to blame. Meanwhile, Lenovo users might have their machines black-screen or shut down out of the blue, seemingly due to power mismanagement.

While it's heartening to see that Microsoft has significantly increased its Windows development speed and is seemingly listening to customer feedback, a string of bugs after a major feature update are still common.