Disabling Windows Compatability Telemetry

Just a heads up, they changed the display name from Diagnostics Tracking Service to Connected User Experiences and Telemetry. The real name is still diagtrack in PowerShell and the services tab under Task Manager though. I guess they thought people wouldn't like to see "Tracking Service" running on their PC, so they made it go incognito.

Thank you! this fixed it for me

I did figure it out.  The root cause of the problem is that the disk is thrashing due to paging i.e. swapping and an IO intensive application CompatTelRunner.exe.  My one terabyte disk was 2/3 used up.  I have a lot of software installed on this laptop.  The laptop had only 8 gigabytes of ram.  

Telemetry starts at 7:00 PM when I am typically playing an online game such as World Of Warships.  The game has a memory commit size of 1.2 gigabytes before beginning a battle; remember I only have 8 gigabytes of memory.    Each battle involves downloading a huge amount of data before it can start.  The memory commit size is 1.9 gigabytes once a battle begins and the commit size is even .  My system starts paging when a battle starts.  This means it needs fast access to the disk.

Along comes CompatTelRunner.exe, which starts with a small working set that continuously increases while it runs but does thousands and thousands of disk reads and millions and millions of I/O other.  Procexp64 shows the IO other is caused by 2000 page faults per second!  Ah ha, Microsoft is could be opening a memory mapped file and reading from it.  A page fault occurs every time they read outside of the sliding window.   OR it is possible that they are reading through shared memory or even memory in other processes using a driver of some kind.  Whatever it is the combination of the game and CompatTelRunner.exe page faults is a nogo.  My system is unable to allocate enough virtual memory fast enough for me to enter a battle and my team ends up playing a man short because Microsoft is over using the virtual memory system with their malware.

So I bought more memory and installed it on my laptop so that Microsoft's malware will not ruin my gaming experience.  This fixed the problem.  I would like Microsoft to pay for the upgrade.  

Seriously? Telemetry is back to using 100% disk throughput after I killed it with fire less than two weeks ago. And now it's brought a friend, when Windows Compatability Telemetry stopped Microsoft Windows (R) System Protection kicked in, also ramping up to 100% although it finished after about 2 minutes. The worst part is that I have the Windows Compatability Telemetry service disabled (it was listed as stopped while Telemetry was hogging my disk) and it's also turned off in the settings app, yet it still manages to rise from the dead and freeze up my programs.

I am running Windows 10 Pro and have the same problem with Compatability Telemetry slowing my computer.  I do not have the registry folder {DD17FA14-CDA6-7191-9B61-37A28F7A10DA}.

Windows 10 updates are mandatory and will install automatically whether you want them or not. 

The registry key I mentioned only applies to Windows 8.1

If you feel that a telemetry update is slowing your system down, I'd advise you to open a new thread in the Windows 10 forum.

Change the dropdown menus to look like you see them in the following screenshot otherwise your question will appear in the 8.1 forum again.

Good for you Bill!!! CompatTelRunner.exe also happens to be an unwanted process that Windows Update itself had installed on my Windows 7 machine without my explicit permission and so I can totally understand your frustration regarding this issue. According to other websites that I've read in regards to CompatTelRunner.exe, this process is part of Windows itself and collects information to look Windows 10-compatible software, but it's this information collection scheme every single week of Microsoft's that really has me worried.

To fully remove CompatTelRunner.exe, just follow this weblink.

This question is directed to Microsoft: If we uninstall CompatTelRunner.exe through the Add/Remove Programs control panel applet, then why does Windows Update keep on installing CompatTelRunner.exe under new KB numbers and executing every week? I don't want or even need this process running on my computer since all that it does is slow everything down to a crawl when it runs and continuously access about 90% of my hard drive for about 20 minutes or so forcing me to shut it down through the Task Manager.