Hey Jess,
Go to ASUS.com and search for your device with the search function in the top right! Click support and then Drivers&Tools after this please can you select WLAN and re install these drivers. This may solve any issues if you are experiencing any slowness.... However nowadays standards for content rich websites usually require something a wee bit faster than the connection you have right now!
If this still fails call 01442265548 if you live in the UK.
Cheers