Windows 8.1 Update 1 is yet to hit RTM status, then. How do we know that? Because Redmond has compiled another build of the upcoming refresh of its operating system, and it is not the final one.
According to WZor, this new version was signed off on February 23.
The leaker has also published some new screenshots of Windows 8.1 Update 1 build 9600.17031, which in all probability is the latest version of the update that has been compiled as of this writing. You can take a look at the Digital Signature Details window in the image above.
Anyway, the build string of this version is 9600.17031.WINBLUE_GDR.140221-1952, so if it leaks out in MSU format in the coming days, you know what to search for.
The company was expected by some to have finalized the RTM version of Windows 8.1 Update 1 before the end of the month, but here we are at the last day of February, and there is no news of the update hitting this important milestone.
In any case, Microsoft is in the final stages of development, and these new builds most likely fix bugs and issues that have been reported by hardware and software testing partners.
A few leaks are already available right now, so if you want to get a glimpse at how Windows 8.1 Update 1 is shaping up, you might want to download these unofficial builds.
Just make sure you do not test them out on your main PC.