@Privateofcourse : well first after I complained about speed issues with V6 stable, I found the pre-release version to be much faster. And second, if you got such issues as what you describe in your post, then your Windows install is broken. Avast just doesn't do such things to systems.
Issues with moving files, deleting files, etc... came with Vista and are still there off and on in Seven, explorer just breaks once in a while. Try to create another profile, and if this doesn't work, re-install Windows.Yes of course you could check what happens if you uninstall Avast first, if things are better or not. Which still wouldn't mean that Avast is the culprit, but Windows cannot deal anymore with Avast drivers >>> on your system.