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Sometimes my computer stops responding and crashes when I connect to the Internet via my Huawei EC1261-2 modem. But, when I don't use my PC to connect to the Internet this rarely happens.

Does anyone know what may be causing this and how I can fix it?

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Look for latest drivers on manufacturer website or even try execute a Windows Uptade to try to find another driver automatically. – Diogo Jun 4 '12 at 17:33
Ok, i'll try to update my driver.. if the problem presist i'll tell you again.. thanks for the help friend. – RezaSkizo Jun 4 '12 at 18:04

Try to uninstall your modem driver and than reinstalling the modem driver.

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As Diogo said, you need to install an updated driver. Your best bet is, in preferable order...

  1. From the computer manufacturer's website
  2. Windows Update
  3. The hardware manufacturer's website
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