Internet noticeably slower on one computer while faster on another connected to the same router
Few things to try (test your speed after each step to see if the problem persists):
- Connect the computer to the router using a different ethernet cable.
- If you have a switch in between the computer and the router, try connecting the computer directly to the router.
Check link speed/duplex:
- Press + to open the Run menu, and type to open Device Manager
- Expand Network adapters and double-click the appropriate adapter
- Navigate to the Advanced tab
- Select Link Speed & Duplex from the Property list and make sure its value is set to Auto Negotiation.
Reset the TCP/IP stack1:
- Click Start, search for
- Right-click cmd.exe and click Run as administrator
- Type and hit Enter
- Reboot the computer.
1You can also use the Fix it wizard from the following link: https://support.microsoft.com/en-us/kb/299357
A corruct TCP/IP stack can cause several issues with the network connection. Resetting the TCP/IP stack will overwrite the following registry keys:
This has the same effect as removing and reinstalling TCP/IP (https://support.microsoft.com/en-us/kb/299357).
If none of the above solves the problem, your network adapter may be bad, or you could have some sort of malware which is hogging the bandwidth.
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