Microsoft has been banging the Windows 10 patch drum almost daily as it prepares for Wednesday’s launch.

In the last seven days, Microsoft has pushed four security updates to build 10240, the final served to members of Windows Insider before the July 29 release. Insider is the beta program Microsoft’s run since October 2014 for the new OS.

Three of the four — delivered on July 23, 24 and 25 in separate updates — offered identical descriptions of their contents.

According to KB3074679 (for the July 23 update), KB3074680 (July 24) and KB3074681 (July 25), the trio addresses MS15-078, the “out-of-band” emergency update Microsoft first served up July 20 with yet another update marker, KB3074667.

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