Sounds like you've narrowed it down to the wireless driver, then. If it really bothers you that much, pick up another cheap wireless USB dongle and try that out to see if another brand might not do this.
My Computer
At a glance
XP / Win7 x64 ProIntel Quad-Core Q9450 @ 3.2GHz2x2GB GSkill DDR2NVIDIA GeForce 8600 GTS (EVGA)
- OS
- XP / Win7 x64 Pro
- CPU
- Intel Quad-Core Q9450 @ 3.2GHz
- Motherboard
- Asus P5-E
- Memory
- 2x2GB GSkill DDR2
- Graphics Card(s)
- NVIDIA GeForce 8600 GTS (EVGA)
- Monitor(s) Displays
- Dell 2408WFP
- Screen Resolution
- 1920x1200