Serial Communication lost after a few hours (8 - 10) Arduino Uno R3


I have an Arduino conected to a PC with Windows XP. After a few hours (8-10 hours), the serial connection just stop and i need to restart the PC or deactivate/activate the driver.

I think this can be a driver problem, but i reinstalled the driver and the problem persists.

Does anyone has a solution?

Sorry for my english.