Network Adapters Code 31 Error

Hi,
I've got code 31 error messages (Device manager) on most of my network related hardware. Have been trying to uninstall drivers through D m, which doesn't seem to take effect. Using my WLAN-card Intel Centrino N-6200 as an example, a downloaded Intel driver package executable won't run, giving error message relating to older drivers being present on the machine. Code 31 error is affecting my Realtek Ethernet card also. Computer is HP Envy 17 2050. System restore deactivated.

 

Solved.
Uninstalled Intel PROSet/Wireless Software and WiFi software package via Control Panel. Reinstalled latest version from Intel.
Managed to uninstall Realtek Ethernet drivers. Reinstalled drivers (saved to disc from back when I purchased the laptop).
Both Ethernet card and WiFi card working.