If you actually read the link I previously provided on Event Viewer...you will see how to use the tool. You should only be concerned with errors, not information items, not warnings.
As for uninstalling/reinstalling drivers...
a. Uninstall: Start/Run...type devmgmt.msc and hit Enter. Scroll down to Network Adapters, double-click on it...right-click on the now listed device, click on Uninstall.
b. Install: Using either the drivers CD which came with system or appropriate drivers downloaded from the appropriate website...double-click on the appropriat file or otherwise install according to instructions provided.
There are a gazillion bits of info on installing/uninstalling drivers...available via using Google...if you want/need further info. Example follows.
Installing Hardware Drivers - http://www.optimizingpc.com/install/hardwaredrivers.html