hey, did you figure out the problem? i am facing the same issue.
did you also try to plug the cable directly?
Here is the problem:
i have a desktop at my place that is in the next room to my router, so signal is great. my internet bandwidth is 30mbs. i have cable internet.
speedtest on my phone gives me 15-20mbps
speedtest on an OLD laptop. 10 years, old gives me 10mbps
i have run an internet speed test on the Desktop and it varies between 5mbs to as low as 500kbs. usually 1.5mbps
i thought it was the old wireless addepter that i was using so i went and bought a new wireless USB adapter 802.11n and still the same problem.
RE-INSTALLED WINDOWS. all updated drivers and BIOS. same UP/DL speed
downloaded TCP Optimizer v3.0.8 thinking it was a setting in windows that may be off. same UP/DL speed.
any sugestions will greatly pe appreciated and will save some of my hair.
my router is a belkin 802.11 b/g/n