Installing New Avast Home

I have tried to download and install the new homew version several times and every time i get an error during installation that a file aswcmn0s.dll is missing and install is unable to complete . I have removed all norton software and tried again and the same thing , I have removed avast and tried again and the same thing WHat do I do Now?

You might still have some Norton programs on your computer after you unistall it, click here to unistall Norton completely

http://service1.symantec.com/SUPPORT/tsgeninfo.nsf/docid/2005033108162039?Open&src=&docid=2001092114452606&nsf=nav.nsf&view=docid&dtype=&prod=&ver=&osv=&osv_lvl=

For Norton 2004 or higher, you use the SymNRT or 2003 or less, use the Rnav2003.exe (scroll down)

After that, try to reboot, and install avast! again.