Which version of Adaware: Free/Pro/ 2007/SE?
" " " Avast??
System Info particularly OS, RAM size, HD size, Processor & speed.
In general (as without info can't be more specific) the 2 should not have a conflict IF you do NOT run Adaware 2007 Scan at same time as Avast scan.
Avast AV is for Viruses basically & Adaware is more for Trojans & other malware that traditional AV wouldn't likely be looking for. They scan for different types of problem.
If you have a current Vista large drive & ram type machine, you could try Adaware 2007 free but it is a LARGE program (20Megs about) & would likely strain capacity on older machine with much lesser RAM & processor speed.
I am NOT installing it on my XP 512RAM/80G HD/P-4 3.0htz. for somewhat this reason. Previous SE version was less than 5 Megs and was no problem.
I might suggest other progs in preference but without info..wouldn't know if suitable for your system.
Should my computer use both of these software applications or is the avast sufficient?