I have a Sony Vaio VGN-NR31E/S.
I downgrade it from Vista to Xp Home. Without any trouble.
Until the network device donīt work.
Need the correct driver.

Please help!

Support Information:
Device Type: Network Devices
Manufacturer: Atheros
Model: Sony Vaio PCG-NR31E/S
Interface: Other
Operating System: Windows XP Home
Age of Device: < 6 months old
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=&qa5=12&qa7=1500&dp=0.5&qm0=Sony+Vaio+PCG-NR31E%2FS&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Atheros+Network+Devices+Atheros+Sony+Vaio+PCG-NR31E%2FS+Windows+XP+Home+)

Not as easy as it sounds. It's doubtful that Sony will have a driver available or that they have one period for an OS they don't support with this model. I was unable to even find this model listed on any Sony website..... Try going here and tell it to autodetect your laptop and see what/if it will detect.

http://esupport.sony.com/EN/VAIO