chris_d82
1 Copper

New Inspiron 15 - slow wired and wireless Internet

I am having an issue with download speeds on a brand new Inspiron 15 3000 series. It arrived a couple of days ago.

Both wired and wi-fi internet is very slow compared to other devices on my network.  I am getting download speeds of 20Mbps, while my smart phone is getting 90+.  My previous 5+ year old Dell was also getting much faster speeds from the same router.

So far I have tried the following without any improvements:

Uninstalled McAfee
Turned off Firewalls completely (turned them back on when it did nothing)
Updated all network related drivers 
Made sure that receive window auto-tuning level is set to normal
Disabled all the network adapters showing in device manager but the LAN and Wireless ones
The wireless card is configured for 802.11ac, so i blocked every other type of network coming from the Virgin Media Hub.

Disabled heuristics.

The laptop was also slow on the office internet in work.

Some setting in this computer seems to be capping out my download speeds and I have no idea what.

32 Replies
chris_d82
1 Copper

RE: New Inspiron 15 - slow wired and wireless Internet

Success!  I reinstalled Windows.  Now getting download speeds of 130Mbps through the Wi-Fi using Edge.  Will tentatively try using Chrome later...

0 Kudos
Community Manager
Community Manager

RE: New Inspiron 15 - slow wired and wireless Internet

Hi chris_d82,

Thanks for posting.

Apologies that you had issues with your computer.  Glad you were able to resolve it, and thanks for posting your solution so that other readers can be informed.


Dell-Robert P
Social Media Support
#IWork4Dell
To help us troubleshoot, please send us the Dell service tag number via a private message
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0 Kudos
DivasG
1 Copper

RE: New Inspiron 15 - slow wired and wireless Internet

I am also facing same issue from day 1, even my laptop itself is very slow.

Configurations are very good - Core i5 7th gen, 8 GB RAM, 2 TB harddisk etc

I got Windows 10 pre-installed, but no CD to re-install it, how you have re-installed windows, and which version of windows you installed?

0 Kudos
JovianPug
1 Nickel

Re: New Inspiron 15 - slow wired and wireless Internet

Hey, I just found solution, worked on my Inspirion 7570, maybe it will help you 🙂
Win + R -> type in "services.msc" -> turn off SmartByte Network Service
Before this I had 6-8 Mb/s now I have 320 😄

BenBru
1 Copper

Re: New Inspiron 15 - slow wired and wireless Internet

Wow, thanks for that tip...iv'e been going crazy for three days now.

This solution instantly made my inspiron 5579 get top connection speed!

Deepak8
1 Copper

RE: New Inspiron 15 - slow wired and wireless Internet

how do I reinstall windows when I do not have the CD which it came along with ; I bought from Costco

0 Kudos
Richma
1 Copper

RE: New Inspiron 15 - slow wired and wireless Internet

Did you figure out how to reinstall Windows? I too got mine from Costco. They have since taken it off their website. I wonder if this is why they stopped selling it?!!

0 Kudos
Caduggins
1 Copper

Re: New Inspiron 15 - slow wired and wireless Internet

I stopped that program but ultimately removed it and speeds are well over 250mb. 🙂

0 Kudos
Highlighted
BrewSea
1 Copper

RE: New Inspiron 15 - slow wired and wireless Internet

I have the same issue with my brand new Dell Inspiron 15.

I spent 4 1/2 hours with Dell warranty department trying to troubleshoot this very issue.  They remoted into my computer and did an exhaustive search.  The final result was that it is not a hardware issue, but rather a software issue.  

Now for the fun part... the computer warranty does not cover software issues.  So, they said they can fix the problem but it will cost me over $300.00!! 

What a joke this is.  Dell does not stand behind what is clearly an inherent issue with their product.  

I wish I had never bought a Dell product.  And never will again...