Deus,
What warning?
The certificate warning that the driver is not approved by Microsoft?
Thats because the new driver you downloaded is newer than the one Microsoft has on record.
If thats the case, its safe. You downloaded it from the Asus site so you can trust it.
IF IN THE EVENT the driver messes things up, you can boot XP in 'last known good configuration' and it will rollback to the old one.
If that doesn't work... here are my other thoughs.
1. Update your motherboard drivers.
2. Reinstall Silkroad Online client
3. Turn off lighting options and reduce quality in the game settings
4. Its a compatability problem, and can't be fixed
