Comment # 17
on bug 11766
from Gerald Combs
(In reply to Pascal Quantin from comment #14)
> (In reply to Alexis La Goutte from comment #13)
> > Pascal, it is no possible to check if the update is available with installer
> > ? (or push a warning on Windows 7 ?)
>
> No idea on how to detect if this update is installed. Bug given that SHA1 is
> gonna be soon deprecated, any not updated Windows will soon have issues :(
>
> We could probably enhance the help text in installer to indicate the KB and
> a link to the Github bug report in case of issue.
Assuming that the existence of hotfix 3033929 is sufficient, it looks like we
can check for it using `syteminfo` or `wmi qfe list`. Unfortunately the former
takes 12 seconds to run on my Windows 7 VM and the latter takes 9 seconds.
That's a long time to pause the installer.
Peeking at the registry is much faster, e.g.
> reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages" | findstr Package_for_KB3033929
but I'm not sure how reliable that is.
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