Yes, I have the similar problem:
On my stationar PC I installed XP-OK, fine.
Then Linux Mint Olivia/Nadia-xfce I have tried too. It is the same situation.
In Mint I have network connectivity through Ethernet Lan cable. Good. But when I returned to Windows XP it says: The network cable is unpluged!
I have restarted the router and modem. But the only way to get Ethernet LAN connection to my XP is uninstall Mint and again install the drivers to my Motherboard on-board LAN. The Motherboard is ASUS P5LD2-X/1333. Atheros 10/100/maybe 1000 are the LAN drivers.
I really have spend all my yesterday but this is the only desicion for now; I can't really understand why?- When I turn off from Min and power down all components of the PC(router, PC and so on), and the again boot the XP it is the same.
In Event viewer there is an unstandart Warning:
Your computer has automatically configured the IP address for the Network Card with network address ---- numbers and letters. The IP address being used is ------ numbers. I can't guess why it is apairing. Maybe I don't wait a little from the power off and on?
I have used System Restore and reisnstalling the drivers, when I in the previos session used Mint, but it does't help. I have not succeseded with the help from Microsoft too.
Any other possibilities?
Thank you for the ideas,