Why is my Wi-Fi speed so slow?

I have a HP Pavilion TS 11 Notebook 11-e000sa running Windows 8.1, the network adapters are a Realtek PCIe Family Controller (ethernet) and Ralink RT3290 802.11bgn (Wi-Fi)

I have a fibre optic connection, and my PS3 and iPhone are getting wireless speeds well over 30MB/s without any issues, however my laptop struggles to get 2MB/s.

All the drivers are up-to-date, but there must be something set wrong.

Any help on this would be appreciated!

Slow computer:
1.Clean browsing data
2.Disk Cleanup.
3.Run malware infection scan
4.Clean registry errors.

Turn off QoS, set preamble to short.

Check the adapter settings, it may have issues with "automatic speed" selection, and falling back to a slow mode. Try setting it manually to G mode "only" first, see if that improves it. If that works, try N mode after that.
Also, make sure the laptop is connecting to the same Wi-Fi, not some neighbors by mistake…

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