I assisted my neighbor in upgrading her Vista 64 to Windows 7 64 late yesterday. She tried to connect to the net via her DD-WRT router, which I set up as a Client-Bridge to connect to my wireless, she could not. She used her dialup this morning to connect without problems. I looked at it, knowing nothing about Windows 7, and did an ipconfig /all. This showed an IP of 169.254.12.182 Preferred on the Local Area Connection. I have never seen an IP suffixed with the word Preferred in XP, perhaps it's normal for 7. However, I did click the start button, enter cmd in the search field and press shift/control/enter to enter Administrator mode. I could not clear the IP using ipconfig /release or ipconfig /renew. Nor can I access the router using it's IP of 192.168.1.4. I brought the router to my house and I can instantly access it with my XP machine. On her machine, I selected repair for the adapter and 7 said it was completed. Still no connection to the router. I also selected reset IP and it reset it to 0.0.0.0 but by the time I could type ipconfig /all, the LAN adapter was back to this strange 169.254.12.182 Preferred. I cleared all temporary internet files from IE8, Chrome, and Firefox thinking somehow a cookie might be involved.
What is this "Preferred" IP?
How do I clear it?
Why cannot I access the router?
How can I help her resolve this issue?