Hello and Welcome to the forums.
The first thing to try of course is to determine the exact manufacturer and model name and number of your network adapter and use the vendor's website to insure that you have the most current up to date Windows 7 version of their driver for your device.
Another thing to try would be to manually configure static values for the IPv4 properties of your network adapter and see if that helps.
Using only the minimal information you've provided in the post above I might suggest;
IP Address = 192.168.1.222
SubnetMask = 255.255.255.0 (should auto populate with tab key)
Default Gateway = 192.168.1.1
DNS Servers
Preferred 8.8.8.8
Alternate 8.8.4.4
See if that helps and if you need any additonal help regarding these settings post back and let us known.
Couldn't find out much on the router. It seems to be particularly unique to users geographically located in China. So the manuals and firmware that ASUS has seems to be specific to that area, with warning about if you didn't get it from an ISP there don't use the firmware update.
ASUSTeK Computer Inc.-Support- it's actually very old anyway and probably wouldn't help much.
There of course could be any number of third party software products that may also be impacting your issue. So any additional information you'd be willing to provide might prove helpful. Like a zipped up copy of msinfo32 attached to your next post.