Get rid of the damn X10 ad... Information on X10 Advertising Turn off X10 pop-under ads for 30-days.
This link will prevent your computer from having the X10 "pop-under" ads appear for the next 30 days! You must make sure you have your cookies enabled, for this link will give your computer a cookie that will disallow X10 pop-under ads from appearing on your computer as you "surf" the Internet. If you clear or delete your cookies, then it will be possible for X10's pop-under ads to appear on your machine. If you don't know what a "cookie" is, then you're probably set and don't have to worry about it - just click this link to remove the ads!
Also, if you disable JavaScript in your browser the ads will not open, though this may prevent you from seeing some things you want to see. Ad-blocking software will also help with this problem.