Can someone explain all Avast free shields in details?

[isakkeyten]

I know this question might be submitted a thousand times but I couldn't find the answer anywhere.
Can some one PLEASE do me a favor and explain what all the shields are doing detailed?
Please don't send me in a wild goose chase over the help section of the program, thank you.
Here they are:
 

p.s. this topic could be stickied so everyone would know.

[Pondus]

download and read the user guide.      http://www.avast.com/download-documentation

[isakkeyten]

download and read the user guide.      http://www.avast.com/download-documentation

It's like I said "Please, send me a link of a help file and do not, under any circumstance, explain it with your own words by your knowledge."

[Pondus]

you find the shield info on page 10 - 11.   


http://en.wikipedia.org/wiki/Avast!   

File System Shield — Real-time protection against viruses and other malware threats. Scans files as they run on your computer to keep viruses from being able to execute.
Mail Shield  — Scans messages and attachments in E-mail/Microsoft Outlook/Exchange for viruses.
Web Shield — HTTP protection (local transparent proxy). Version 4.8 also allows the blocking of URLs. Scans URLs and incoming data for viruses, and aborts connections to the site if one is found.
P2P Shield — Scans P2P files from file share programs.
IM Shield — Instant Messaging protection. (Scanning of files transferred through instant messaging applications)
Script Shield — Scans webpages for malicious scripts, and disables them from infecting your computer, though they can still be used (for example, a clickable button.)
Network Shield — Basic protection against well-known network worms. Acts as an Intrusion Detection System.
Behavior Shield — Reports suspicious behavior by analyzing the behavior of programs

[isakkeyten]

you find the shield info on page 10 - 11.   


http://en.wikipedia.org/wiki/Avast!   

File System Shield — Real-time protection against viruses and other malware threats. Scans files as they run on your computer to keep viruses from being able to execute.
Mail Shield  — Scans messages and attachments in E-mail/Microsoft Outlook/Exchange for viruses.
Web Shield — HTTP protection (local transparent proxy). Version 4.8 also allows the blocking of URLs. Scans URLs and incoming data for viruses, and aborts connections to the site if one is found.
P2P Shield — Scans P2P files from file share programs.
IM Shield — Instant Messaging protection. (Scanning of files transferred through instant messaging applications)
Script Shield — Scans webpages for malicious scripts, and disables them from infecting your computer, though they can still be used (for example, a clickable button.)
Network Shield — Basic protection against well-known network worms. Acts as an Intrusion Detection System.
Behavior Shield — Reports suspicious behavior by analyzing the behavior of programs

Thank you.