unable to access specific router

I have a laptop that can access the internet through a wireless router at work just fine, however when this is tried at home I cannot access the internet or ping the router (a wired connection is ok).

1. There is no spyware on this laptop.
2. Two other laptops can access the wireless router just fine so I don't think anything is wrong with the router, although one of them has trouble being assigned an IP address from the DHCP server.
3. The router populates the available network list and shows connected status.
4. The problem laptop is a Windows XP Intel Centrino.
5. i disabled Encryption and MAC filtering but still no success.
6. I have tried both static and dynamic IP, even made the home network the same address range as the work network with router at 192.168.0.1.
7. Trend Micro is configured for network access on this address range. (although I have not tried disabling firewall)

I tried all sorts of things the other day and mangaed to get a connection. Everything was fine until the computer was taken to work and then brought home again, upon which the connection was lost. I am not sure if the failure of DHCP on the router is an indication of problems or if these things happen.

OZSJAsked:
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tim_quiConnect With a Mentor Commented:
OZSJ,

try doing a physical reset of the router; look for a small hole near the antenna, use the tip of a pen to depress the reset switch, hold 15-20 seconds or until all the lights flash and the router reboots. You'll have to reset the password to access the router and any other security settings because the reset will clear them.
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RogeroConnect With a Mentor Commented:
Try deleting the ssid in the properties of your wireless card and recreating it first, I get this problem myself

Rog
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OZSJAuthor Commented:
It looks like the router reset has done the trick. If it happens again I will try renaming the SSID on the router adn then create a new connection.
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