We did that 2 months ago. Not only did we install XP, SP3 and more but the drivers never updated correctly from Microsoft. Off to the maker PLUS we had to install some "helper app" to turn on the WiFi.
Your post as it stands should end with a non-working laptop.
I have re-installed Windows XP and updated the Service Pack. I previously installed Windows 7 and good connection. I have updated the drivers but still only get 0 packets sent and received. I get no IP address because of connection problem. Can anyone help me on what can be causing this problem?