The Home version allows Home user free to use but you need to registration on their web and renew annually, please go to link below and get your key
In Avast, the quarantine not just quarantine, so they named it as CHEST. When you install the avast first time, it will prompt you to restart the computer because it added a scan schedule after computer restart for initial scan to make sure your computer is clean after it is installed.
During installation, there are three files put into CHEST System Files area (kernel32.dll, winsock.dll and wsock32.dll). Another area called USER Files allow user to add extra files into this area for protection, I usually put some programs into this area which backdoor programs are interested. The last area is INFECTED FILES area, virus files are move into this area while detected by user's choice (DELETE, MOVE TO CHEST).
For paid version, you can change the action while virus detected such as repair, delete, move to chest. You can also tell avast if your decided operation is failed, what action will follow as well (simple concept just like IF ... ELSE ...).
I am sure that very anti-virus program has its own characteristic but people just install as default and no one want to enhance the functions by simply go through the instructions provided by deveoper.
Avast does the great job, it can set the protection level for web browsing, p2p, IM, network email etc individually. For IT staff, if you suspect SERVER or workstation infected and can not locate the virus from where, you can also let avast to show you what files/programs/dlls are opened/activated that may cause virus action, good troubleshooting tools.
If you want more information, let me know.
Sorry for my bad English!!