# Windows 10 DNS requests

**URL:** <https://discourse.pi-hole.net/t/windows-10-dns-requests/3255>\
**Category:** Off topic\
**Created:** [May 19, 2017, 7:58pm UTC](https://discourse.pi-hole.net/t/windows-10-dns-requests/3255 "2017-05-19T19:58:50Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mrfabulous](https://discourse-cdn.pi-hole.net/user_avatar/discourse.pi-hole.net/mrfabulous/32/347_2.png) [@mrfabulous](https://discourse.pi-hole.net/u/mrfabulous)\
**Post date:** [May 19, 2017, 7:58pm UTC](https://discourse.pi-hole.net/t/windows-10-dns-requests/3255/1 "2017-05-19T19:58:50Z")

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Hi,

Just wondering if anybody else is seeing a lot of DNS requests going to URLs like: array503-prod.do.dsp.mp.microsoft.com?

I had about 900 requests go out from one Windows 10 machine in a 24 hour period after doing a recent Windows update.

Thanks.

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<div class="post-metadata">

**Author:** ![Anudeep](https://discourse-cdn.pi-hole.net/user_avatar/discourse.pi-hole.net/anudeep/32/194_2.png) [@Anudeep](https://discourse.pi-hole.net/u/Anudeep)\
**Post date:** [May 20, 2017, 6:37pm UTC](https://discourse.pi-hole.net/t/windows-10-dns-requests/3255/2 "2017-05-20T18:37:49Z")

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That domain is related to something called DoSvc "Delivery Optimization Service".  
Try disabling it on your windows machine:  
[HKEY\_LOCAL\_MACHINE\SYSTEM\CurrentControlSet\Services\DoSvc]  
"Start"=dword:00000004  
Or  
Type `netsh winhttp reset proxy` in CMD  
Hope this helps

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**Author:** ![PA3DSS](https://discourse-cdn.pi-hole.net/user_avatar/discourse.pi-hole.net/pa3dss/32/39441_2.png) [@PA3DSS](https://discourse.pi-hole.net/u/PA3DSS)\
**Post date:** [April 4, 2018, 12:23pm UTC](https://discourse.pi-hole.net/t/windows-10-dns-requests/3255/3 "2018-04-04T12:23:02Z")

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Well, read this:

> **[Privacy Implications of Windows 10 Telemetry: Summary: Top Domains for...](https://www.pcministry.com/win10_telemetry/summary/top_domains_for_telemetry_over_https/)**
>
> List of https-related domains has 1017 entries, sorted in descending order by total number of outgoing HTTPS connections initiated by Windows 10 operating system (with default settings without any third party software). We did not include domains...

You can add this blocklist to your pihole very easy  
[https://github.com/crazy-max/WindowsSpyBlocker/blob/master/data/hosts/win10/spy.txt](https://github.com/crazy-max/WindowsSpyBlocker/blob/master/data/hosts/win10/spy.txt)