If -page ads are appearing once an hour (which often they should be appearing), make sure cookies enabled. If cookies are enabled, make sure don't security products (antivirus, anti-spyware) that could be interfering with cookies being stored. If none works, download Adblock browser. We do need advertisement revenue but we'd rather us without ads than with that ad appearing every page.
If getting full-page ads very frequently, please post topic: version, operating system, security products.
Thank you.
