3-10mbps On Just My Desktop PC? Please Help!

Hello forums, i have a very annoying problem that i have got so stressed over.

It is to do with my Internet speed i am getting to JUST my desktop pc in my house. I am with Sky broadband fiber unlimited package.

My PC: Windows 7 Intel Core i7 16GB RAM 64 bit OS
My network card is ASUS PCE-N15 11n Wireless LAN PCI-E Card - Link speed says 144.5mbps

For the past 2 weeks i have noticed my internet speed on my desktop computer (using Speedtest) is mostly around 5-10 mbps sometimes dropping to 3mbps (The lowest has been 0.23!).

My old MSI FX600 MX has faster internet speed, being between 30-45 Mbps! I also tested my sisters HP Laptop which was also around the same Mbps.

I contacted Sky and they reset my router to a different channel but it hasn't done anything so this is why i believe it must be something to do with my PC.

I have already read lots of posts with similar problems. Checking for programs hogging bandwidth, cant seem to find anything. I downloaded TCP views and noticed i have a lot open 137 with 27 listening? A lot of Icslap is listed? I tried currports aswell. TCP snapshot Currportshttps

I noticed a Port 50626 called [System Process] had over 4,000,000 received bytes then dissapeared. Is this normal?

I also checked for AMD qiuckstream which i read can hog bandwidth but i dont have it. I did use to have a VPN awhile ago but dont have it anymore.

So i have really been trying to figure out the problem but just came to a blank and dont know what else to do, i dont want to be fiddling around anymore with my PC in case i damage it.

I watch a lot of videos online Netflix etc. and listen to music on youtube and because of the slow bandwidth i am getting, they are just buffering, i brought a 4k monitor recently and cant even watch anything in 4k because of course it requires around 25mbps. My web-pages sometimes take awhile to load, which is annoying when i doing research for college. It is frustrating the hell out of me.

Can anyone help me with trying to find a solution?

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Get a new USB wifi device
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My guess.

And that is all it is, is the port 50626 was the source port and not the destination port so it's only guessing that it was one of Windows 10's update methods.

I'll be honest that 11n is now pretty dated and if I were to make this call I'd test with a hardline (Ethernet cable) first then pull one of those under 20 buck 2.4/5GHz USB WiFi sticks out of my PC Medic Bag and test with that.

There's more work if this PC was home built and even then with a factory installed W10 we may have to start over on BIOS and drivers to get the machine tuned up.

There's also known issues with a lot of HDDs but you shared about the percent of the iceberg above water so far. If you share a WEB SPECCY then we see a lot of what's going on under the hood.

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