I will only buy Avast, if I get to solve this problem, because doesn't make sense to pay for a product that doesn't work appropriately!
this product works perfectly, not just as you said "appropriately"... your problem is that you are using two antiviruses on the same computer, and that's what we all are trying to explain to you... avast! was not built to work "appropriately" with another antivirus resident in the system.
avast! same as other antiviruses, works on a low driver level, and even if it's fully disabled, it's components are always "alive" somewhere inside. Same story with some other antivirus tool...
And this is the exact reason why those programs won't work properly with each other.
avast! however does it's job perfectly if you use it and configure it correctly and properly.
Also, avast! doesn't have a problem with Outlook Express at all. They just adore each other
Many of us are using OE perfectly in tune with avast! and none of us is having problems you mentioned.
If you wanna try avast! before you buy it, you will need to completely uninstall AVG... from the scratch... just then you can be sure that nothing is on avast!'s way... then, you can really try how everything works