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DiagTrack Stop Fixes Win10 Update Ills

Last week’s cumulative Win10 update KB3201845 apparently delivers unwanted side-effects. For some users, that update clobbered the Connected Devices Platform Service (CDPSVC). In turn, this kept DHCP from working. No DHCP, no IP address; no IP address, no Internet access. Thus, MS hurried out another cumulative update on Patch Tuesday, 12/13: KB3206632. But as with other recent updates, some encountered problems getting the whole download, or installing the update completely. For those unwilling to try WUMT as a WU alternative, it seems that a DiagTrack stop fixes Win10 update ills for KB3206632.

The DiagTrack service is kept Running by default, but may be stopped and restarted under admin user-level control.
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Why Is It That a DiagTrack Stop Fixes Win10 Update Ills?

The DiagTrack service in Windows 10 already has something of a black eye. At least, it scares members of the tinfoil hat brigade and those concerned about unwelcome surveillance. The Task Manager Description for DiagTrack explains much: “Connected User Experiences and Telemetry.” Ed Bott helps debunk this paranoia in his ZDNet story “Windows 10 telemetry secrets: Where, when and why MS collects your data.” In that piece, Ed explains cogently that

Microsoft uses telemetry data from Windows 10 to identify security and reliability issues, to analyze and fix software problems, to help improve the quality of Windows and related services, and to make design decisions for future releases.

He also explain how to tweak telemetry settings. That’s how users can reduce, if not eliminate, opportunities for MS to glom onto and extract personal or sensitive data from Windows PCs. This should calm the fears of those worried about Microsoft spying on them.

But what does DiagTrack have to do with downloading and installing updates? I don’t know, and haven’t yet found any information that sheds light on how or why it might interfere with WU. Be that as it may, users have reported that stopping the DiagTrack service can help. Do so before firing off Windows Update enables the downloads to occur, and installation to complete. (Remember to restart the service when the update process is done.) As an added bonus, in fact, it also appears to speed updates significantly. That’s why I can’t wait to try it myself when the next cumulative update appears. Alas, by the time I’d learned this, the latest Cumulative Update had already made its way onto my Win10 PCs.