I am having the same problem. I have just installed a Cisco Linksys E3200 Wireless Router. I have been able to connect my Mac laptop by entering the password when requested after initiating a connection to my router network. However, when I try to connect my Dell Latitude E6400 laptop which is running WinXP Professional, I get the dialogue box asking me for the Device Ownership Password, the cursor is in the text box but it is not possible to enter any alphabetical characters - only numbers.
I also need some assistance,