I recently upgraded my modem to one recommended by Comcast, purchased from Amazon. At about the same time I did an update of my Win 10 system.
Currently, I am experiencing slow internet speeds, and wondering if the modem/router combo is working up to capacity. Here are the Xfinity speed test results: 11.54 Mbps download, 12.00 Mbps upload. These speeds seem too slow.

Attachment #1, (jpg file)

What speed are you paying Comcast for? I upgraded like 3 weeks ago to Win 10 1803 before it was officially released and my speeds went from 60MB to 5MB. I finally restored an image back to 1709. What update was it you did? Was it the one to build 1803?

HP Envy 750-520,Intel I7-7700, 8GB DDR4,PC4-19200,Radeon RX 460(2GB GDDR5 Graphics)256GB SSD/1TB Hard Drives

Will check on the update and report back.

I find that I'm using version 1709 I'm thinking that the new modem/router may be at fault.

Try a different computer.
Try different OS (different Windows & or Linux).
Reset modem/router.

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I am running 50 Mbps Download, 12 Mbps thru an ac line converter from the modem. Close to 75 Mbps at modem on a laptop directly connected.
This is with Comcast using my personal modem(Motorola/Arris Surfboard SBG 6782).

Bill

I just spent about 20 minutes with a comcast agent who went through a procedure of resetting my modem/router. He said that it would take about an hour for it to fully take effect, but so far, no joy.

Still no progress in upping my internet speed. I have a Rosewill USB receiver connected to the modem/router which is several years old. Could that be the cause? Recommendations?

BTW: My previous modem with separate router attached was faster than my current one.

Would a new receiver help? I searched and found the following:

https://www.amazon.com/Realtek-300Mbps-802-11n-Wireless-Network/dp/B00AVSRLTO#HLCXComparisonWidget_feature_div

Is this a reasonable item?

I also found this: https://tweakbit.com/en/land/pc-repair/new1?build=speed&clkid=78x5519x20180504141256b5791160&utm_source=new.speedtest.net&utm_medium=pc-repair-kit&utm_campaign=Speedtest.US-EoT-new1

Comments?

I downloaded it, but haven't installed.

I use a Netgear Wireless-N Dual Band WNDA3100 for a wireless receiver and get good results on Comcast as indicated in previous post.

Bill