First of all you have misunderstood as far as i know. Your internet speed can't be 100mbps it may be your lan speed. And understand this:
Suppose your internet speed be X /sec but practically X/8 is your download ratio if you are not using DSL modem. ;0But anyways as mentioned in previous posts try to scan for viri and malware on system.
regards,
0x00
check the dates on all the old threads you are waking up!!!lol