Hi:
Give these a try...
First try the ones from the 850 g1's support page.
If for some reason they don't work...
Wireless...unzip and manually install the first driver listed under the wireless driver section.
http://www.asus.com/Networking/PCEAC66/#support_Download_30
Bluetooth:
http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS029104
The install may fall, but if you used the device manager and update drivers and point to where the software extracted it will install just fine.