Alastair

Very new Dell optiplex 755 with Vista Biz + Intel 82566DM-2 Gigabit adaptor
to 100 local home LAN and internet connection. Frequent loss of LAN
connection > red cross > says network cable unplugged (but not). Switched
cables repeatley with old XP PC to eliminate this.

Tested card - OK (this might clear the problem sometimes).

Found a reference to Windows powermanagement but not able to try dissabling
as my Power Management tab differs.

Did not notice untill after I ran Transfer Files & Settings.

Help