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Fixing Windows 10 100% disk by stopping SysMain

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I just spent hours trying to figure out and fix a Windows 10 machine that was taking 100% disk, 100% RAM and about 50% CPU with absolutely nothing running. Of course, I initially blamed the user... then, a misbehaving (hidden, background) app... then, malware / virus... the, a runaway Windows Defender... then, a hard disk / hardware failure... but ultimately discovering the culprit is - drum roll - Microsoft Windows itself! As usual!

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Legacy HP computer info

legacy windows

It's the last day of 2016... Time for a bit of nostalgia! Over the years, I posted bits and pieces on Blogger, myByways.net (Microsoft), Google Pages and others. For posterity, I've transferred selected information about a HP notebook and desktop I used to have, but I doubt any of this information is relevant any more.

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