I have a weird problem.
A friend has just bought a Lexmark 7500 Wireless All-In-One inkjet printer. I have set its wireless up correctly so that wireless laptops can print from it, and ethernet connected desktops can via the router. However one cannot access the internet when the wireless printer is operating. I have tried IPCONFIG /RENEW, and this all seems fine.
When you switch the printer off AND switch off and switch on the router then you can reconnect to the internet from the laptops and desktop PCs etc.
So somehow the printer WiFi is messing with the router internet setup. Incidentally it is a SOHOspeed ADSL Wireless router.
Any ideas greatly appreciated.