Wireless acces works ethernet connection unidentified?

[Plec]

I have a Homehub 2.0 that has worked flawlessly up until now.

I am using WIndows 7 RC1 and I don't have any bt software installed.

I can't access the internet or the homehub interface via the ethernet cable - yet i can wirelessly via the laptop. When i open up 'network and sharing center' it has it listed as 'unidentified netowrk'.

When i try to resolve the problem it comes up with the error - 'local area connection doesn't have a valid I.P. configuration'.

I'm afarid my network knowledge is very lacking as it's not an area i've had to trouble shoot before - i've been lucky up until now.

There is one other thing - just before this happened i was in the BIOS and accidently pressed enter on the 'SMART LAN' option it's a Lan cable diagnostic function' - is this just coincidence or has this caused the problem? (could it have confused the hub or the port itself?)

I've reset the hub and also unplugged it for several minutes - but to no success.

It's got me stumped and i've spent 2 hrs googling for a solution but i've either not recognised the answer or i have a wierd problem which is why i wasn't getting any hits.

Any help appreciated.

 

[Plec]

Sorted with a windows 7 re-install - brutal but effective.

EDIT: Just a heads up for anyone having network problems using windows 7 - the below may be of some use:

I had a network issue after a Windows 7 'optional' update for my onboard network adapter (LAN Realtek 8111C chip ) - see sig for motherboard. (I never use window optional updates normally - but as there are very few drivers out there for this OS i opted to use it)

After, allowing windows to update the driver for the adapter, windows was unable to identify my network. Obviously, the solution was simple - just 'roll back' the drivers in device manager - and voila!