Windows 7: My internet speed very slow , how to fix ?

My usual net speed is 115kbp/s on every pc/laptop i have in my house connected to my modem via wlan . On everyone is the same .



for example I use WLan to connect to modem that is aproximatle 2 meters away from my TP-LINK TL-WN422G small antena ( on the antena case is says 54 mbps's)
.
that speed (115kbp's) is every day from 0-24h and its kind iritanting .

Is there any way to speed it up ?

My speedtest.net screenshot:
Check for Attachment

What speed of internet are you paying for?

The 54Mbps would be Max LAN speed. Not WAN.

I dont know , when i was buying net it was around 2009th year . I recently got new modem from then .
The one I got now is

Siemens Gigaset sx763 wlan dsl .

Unless you actually know I can only assume your internet speed is around 8mbps or 1Mbps. Then the test look normal.