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Question

One PC slowdown another PCs Internet connection

May 24, 2017 9:11PM PDT

Our office has around 15 PCs and all of them uses D-Link DWA-548 Wireless N PCIe Adapter to connect to wifi.

When I turn on my PC the internet connection on my PC and PC next to me get very slow.

No other PC in office get affected.
All of us connect to same wifi router.

If one of the PCs turned off Internet goes back to normal speed in the other PC.

We don't have any download programs in our PCs.
When i check resource monitor don't see any program downloading lot of data.

My PCs have Window 10 Pro and the other computer has Windows 10 Enterprise. I have Avira virus guard free version installed in my PC.

Can anyone suggest how to fix this problem.

Discussion is locked

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Answer
WiFi is shared so you have to find what it is.
May 24, 2017 9:24PM PDT
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turned OFF but didn't fix the problem
May 25, 2017 4:17AM PDT

This setting was ON.
I turned it OFF.

However it didn't fix the problem.
Is there any other things that could cause this?

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Torrents, malware and
May 25, 2017 6:24AM PDT

Such. Your IT needs to look at what's sending, chatting and see if they can curb that.

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Answer
Here's the tools I use.
May 25, 2017 8:06AM PDT

Remember there is no single cause or cure. You must explore the machine to find what's wrong with it. It can be hardware so in an office setting your IT staffer shall have a spare WiFi stick to test with. I am encountering offices that try to go without any IT staff and the too often fix is to factory reset the PC. That's an option if there is no time and no staff.

So here's my current tool set I use a lot.

1. I scan with Grif's advice at http://www.cnet.com/forums/discussions/how-to-remove-pup-option-603542/#post-f742c795-5881-433b-a29b-6d758efe5cd3
2. I examine the report from https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web
Said examination is line by line. As the maintainer of said PC you either know what each line tells you or you do research to see what it is. This gets easier the more you do this.
3. Spare WiFI USB stick. I run into odd WiFi card failures so it's become a necessary item in my PC medic bag along with spare USB DVDRW drive, bootable USB OSes and USB HDD to copy files out. I now have a few USB install sticks for Windows 10 now that the license system changed.