Marian...Have you updated it to the new version?
This Avast screwed up my windows XP computer...Plus I have a laptop. Plus a new Alien computer which it almost messed up today. The XP computer was a wash after I did a restore, and didn't have the CD to get it back to the factory settings.
All I want is for some people to know. I had Tech support from alien ware tell me today to get Avast off of my computer...
It also could be the Optimum online server also. Because when I did a computer check from Alien spawn it said my Dell wireless manager was disconnected... Hummm.
I believe Avast disconnected in some way...
Also with Microsoft Essentials they don't ask you to register unlike others, because others later down the road they want you to PAY.
Please stay away from Avast...Microsoft Essentials does the JOB..