Can`t Connect or detect the projector

Hi, I recently upgrade my hp pavilion dv2000 to window 7, unluckily my laptop can not connect or detect to projector anymore. Any suggestion to solve this problem ?
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More about connect detect projector
  1. You have to reload the video drivers with the device plugged in, and the antivirus and firewall turned OFF.
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Drivers Connection Projector HP Pavilion Windows 7