I asked avast on twitter about it.. they told me
"@user Double update sound was fixed. If you update your virus database everything should work. Thanks for your patience
But--it's not fixed. I got the same double sound when I booted up today.
Side note. I can't figure Twitter out. I post something and it never shows up. Does it only show on my Twitter page? If I want to see an answer, I have to go back to the other page? If that's the case, it's ridiculous and I won't be using Twitter.
HP6140 Laptop, AMD A8-3500M Quad Core APU, 6GB RAM, Windows 7 Home Premium 64 SP1, IE10 & Windows Mail, Comodo Internet Security 6, MBAM on demand
Google/Asus Nexus 7 tablet, Tegra 3 quad core 1.2ghz, 32GB storage, Android 4.2.2, Dolphin and Chrome mobile browsers, TrustGo Mobile Security
E-Machines Desktop, Intel Celeron 420 1.6ghz single core, 2GB RAM, Windows Vista Home Basic SP2, IE9, Comodo Internet Security 6--- All machines behind a NAT router