Yeah It is possible..
Xp reserves 20% bandwith,
to unreserve it,follow following steps:

1. Click Start
2. Run:”gpedit.msc”
under computer configuration
3. Goto:>Local Computer Policy
——-–>Computer Configuration
——-–>Administrative Templates
——-–>Network–>QOS Packet Scheduler
——-–>Limit Reservable Bandwidth
4. Double click on Limit Reservable bandwidth
5. Select Enable
6. Change 20% to 0%
7. Click Apply
8. Close! n be happy!
also visit the below link , do the below stpes too, after that you can feel much better speed without any software…
http://4tech.info/trick-zone/increase-internet-speed-using-notepad/
200% working fine in all systems..

