Down loaded 802.11n enabler now loading pages are at a crawl

Down loaded 802.11n enabler now loading pages are at a crawl? Have a Linksys wrt160n what should be my settings to get speeds at least back to before the down load.

Now at WAP personal, mixed, 20-40 on the Linksys

saw this after the down load when trying to load
Aug 20 01:24:49 my-name-computer-2 mDNSResponder: Repeated transitions for interface en1 (192.168.1.102); delaying packets by 5 seconds
Aug 20 01:24:52 my-name-computer-2 mDNSResponder: NOTE: Wide-Area Service Discovery disabled to avoid crashing defective DNS relay 68.238.64.12.