|from command line use nslookup that site name.|
If you get a returned ip then use it in the browser.
Then we'd need to decide which way to go.
Other choice is to use a search engine lookup for that site saved to favorites, click on web sites link and see if it works.
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10