I start downloading from torrents at night arount 3 am but the downloading speed is much less than expected i.e around 30 kilobytes per second but at 4 am electricity went off but my pc was working thanks to my APC ups.
when i checked downloading speed it suddenly reached 150 kbps which was real speed that is supposed be.

I think reason for that was everyone surfing on same line switched off their pc's and whole bandwidth was available to me.

Now my question is that isn't there any software or method that i can use most of bandwith even when other people in my area are online???

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Increase BROADBAND speed

This is for broad band connections,

Make sure your logged on as actually "Administrator".
Start->Run->type gpedit.msc
Expand the "Local Computer Policy" branch.
Expand the "Administrative Templates" branch.
Expand the "Network Branch".
Highlight the "QoS Packet Scheduler" in left window.
In right window double-click the "Limit Reservable Bandwidth" setting.
On setting tab check the "Enabled" item.
Where it says "Bandwidth limit%" change it to read 0.

Effect is immediate on some systems, some need to re-boot. This is more of a "counter what XP does" thing. In other words, programs can request up to 20% of the bandwidth be reserved for them, even with QoS disabled

The basic principle is that Microsoft by default blocks 20% of the bandwidth for its own purposes. We are reducing it to zero!

it does work , THanks

Download MySpeed PC Lite software and put setting to california or illinose server . This programm shows very realistic speed of india to us server connections