Avast free antivirus home edition

avast free home editon. I have a red x at the right hand corner of my scrren on the avast icon. I clicked on it and it says unable to scan no end point ? please help

Have you rebooted ?
If so and the problem still exists - Try a repair of avast. Add Remove programs, select ‘avast! Anti-Virus,’ click the Change/Remove button and scroll down to Repair, click next and follow.

Have (or did) you another Anti-Virus installed in this system, if so what was it and how did you get rid of it ?

we had pc shield deluxe and we uninstalled it.

Well before this topic I had never heard of pc shield deluxe. After a google search I’m even more concerned as it could be associated with a rogue security application depending on where you got it (some sites have a bad reputation) ?

So it might not be so easy to remove.

Also see http://www.askvg.com/ultimate-collection-of-uninstallers-removal-tools-for-all-popular-anti-virus-software/ for others not listed above.
and http://uninstallers.blogspot.com/