I have one router,(belkin, in auto wireless channel with 802.11b and 802.11g & ...), and i use ookla speed test to check my speed, and i get always around 25.00 mbps download and 4.00 mbps upload with my android tablet and phone,and about the same with my older ubuntu laptop, but with my new core i5 windows 8 vaio laptop get just around 2.00 mgps upload/download, and sometimes if i unplug both router and modem, i have the same speed as my tablet and other laptop for sometime but after a little while my speed on win8 laptop decreases to about 2.00 mbps again, any idea why? or any suggestion please?