How to overcome “Stuck while installing Visual Studio 2015 (Update for Microsoft Windows (KB2999226))” via – Stack Overflow
Posted by jpluimers on 2016/06/15
Visual Studio 2015 install stuck on “acquiring” KB2999226
I had exactly the same when installing Visual Studio 2015 on a Windows 7 x64 system: stuck on “Acquiring” the “Update for Microsoft Windows (KB2999226)”.
So as mentioned in the StackOverflow answers for the below question, I manually downloaded “Update for Windows 7 for x64-based Systems (KB2999226)” which you can get directly at https://download.microsoft.com/download/1/1/5/11565A9A-EA09-4F0A-A57E-520D5D138140/Windows6.1-KB2999226-x64.msu.
Be sure to quit both the Visual Studio 2015 installation as well as any (“automagically interfering” background Windows Updates), as otherwise you get this error:
--------------------------- Windows Update Standalone Installer --------------------------- Only one instance of wusa.exe is allowed to run. --------------------------- OK ---------------------------
If you still get that error, then
- try to stop/start the
wuauservservice: usually it gets rid of the error. - When it still occurs, try a clean boot, then re-apply the KB.
Applying the KB can take a long while, even on fast hardware.
–jeroen
The Wiert Corner - irregular stream of stuff 
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