Wireless adapter speed very slow

[Eastern_Dude]

Good morning. 

I have an HP Pavilion dv6-1355dx notebook PC with Windows 7 Home Premium 64-bits.

The Wireless Network Speed is very slow. I already checked for the antenna and it is OK. It gives continuity in the 2 cables.

I have the Network Adapter Intel Centrino Wireless N-1000.

I already tried to update the driver via "device manager" but it tells me that my driver is up to date. 

With another laptop it gives me 54 Mbps (my fullest, because I use b/g) and with my cellphone also gives me 54 Mbps.

What can I do? 

I tried to check for most recent drivers on HP Site but it never loaded. https://support.hp.com/us-en/drivers/selfservice/

Software and Drivers > Identify > Download

Thanks for your help.