Why does my internet go so slow?

Well i have Intenet with Verizon and i have the Antiontec GT704WG. I login yo my Router and it said:
Speed(Down/Up): 861 / 156 Kbps

But when i actually download something of the internet it goes at 90kps max….
Why is this please help me.

Another thing. I scan my pc for viruses or trojans or spywares. But nothign was found.
I use Nod32 and Ewido for spyware removal. Please help.

ahm…do you know the difference between kB(kilobytes) and kb(kilobits) ?

since 1 byte = 8 bits and your router told you your download speed is 861 kb(bits)per second,
861/8 = 107,625, which isnt that far away from 90kB(bytes)per second..