lost ethernet driver, do not have the driver disk for this, mainboard unknown looked every on the board no info on it.

Support Information:
Device Type: BIOS / Motherboard
Manufacturer: acer aspire
Model: m-5201
Interface: USB
Operating System: Windows Vista x64
Age of Device: < 6 months old
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=&qa5=1&qa7=1800&dp=0.5&qm0=m-5201&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=acer+aspire+BIOS+%2F+Motherboard+acer+aspire+m-5201+Windows+Vista+x64+)

No 64 bit drivers are available for this machine that I'm aware of... only 32 bit drivers are available from Acer.

http://support.acer-euro.com/drivers/desktop/aspire_m5201.html