For anyone interested here's my experience with the TEW-424UB V2 wireless UsB device, but first things first:
1. I got a PCI TRENDnet TEW-423PI card which I installed and drivers
and software were running ok, until suddenly the device died. Don't really know what happened but never really worked out; I tested it in WinXp system and failed... So I do not recommend to get this device it's kinda crappy.
2. I got a TEW-424UB V2 device and installed it in my Dell Inspiron 1525(running Windows 7) with an alternative Ethernet connection to internet, so I plugged it and Windows told me instantly "the device is not going to work" so I tried installing the drivers from TRENDnet and got a BSOF, I uninstalled everything and plugged it again, I waited a few seconds and windows told me that there are alternate drivers for the device that I should try, so I went over the other manufacturer website and downloaded the other drivers, surprise they worked and the brand is totally different is not TRENDnet, its from silicon integrated Systems so kinda weird (if anyone need this drivers just ask).
3. I removed it from that laptop cuz it already has a working wireless connection and plugged into my main desktop with the drivers on a memory flash, I got it running until I started downloading something and got a BSOD
then I reboot the pc and it wasn't able to connect to the net and every time I disabled the device to enable it again got BSOD all the way... I uninstalled everything and got it running again... but I cant download things, just browse the internet and chat. weird stuff...
4. Don't get this device either