Wired Xbox 360 controller on Window 7 not recognized

I got a very funny issue with my xbox 360 controller here...
I bought it 3 years ago while im still in college, often used it on my laptop (win xp) and it runs well, no problem.

Last year i bought a new PC with Windows Vista, and still no problem, i played many games with that.
The problem exist since i format my PC to Windows 7 ultimate 32

Here's the funny stuff, after few experiment, i found out that "The longer I dont use the controller, the longer i can use it afterward"
I guess u will confuse about what im talking... but its true

For example.... I turn on my PC, and i did not plug in the controller for hours, maybe surfing webs or do some stuffs, then when i decided to plug it on to play some games, it actually works but it has a limited time. After some time, it stop working and the green light disappear.
Like I turn on the pc without plugging in the controller for 30min, then when i plugged in i can use about 30min (i didnt record it, just for u to understand easily)

When i try to unplug it and plug it on again, the green light on the controller flash once, and my pc said USB Device not recognized, what the heck is this?

I've even tried to restart the PC, windows 7 loaded, i plug in the controller, about few minutes it not working again

I've been searching for solutions for few hours, updating the driver from the microsoft website, XBCD and few emulator, tried it but nothing helps

Could anyone tell me what is happening?

bump.. need help plz

any1 could help me?