Limited or no Connectivity Vista

Hi I hope someone can help. Take it slow cos Im a beginner.
I have 2 computers both HP. PC running XP with no problems accessing the internet via my wireless router. Laptop with VISTA which I cannot access the internet also on wireless.
My laptop is picking up my wireless network and the signal strength is excellent. However it wont connect It shows limited access only which wont let me on. I have typed in the correct security Key. Re-booted but no accesss.
Thanks

 

Ah ha! I had this problem a few times. Its a new computer to the network so this should work...
Turn on computers, and wait till you get fully booted. Then unplug the power supply from your router. Wait for a minute or so, then plug it back in. If all goes according to plan, windows will find the network and let you back on. I assume you just want a fix not a reason, but if you want to know why it happnes, post and i will try and get back