What's Improved in Avast Version 5.0

Avast Intelligent Scanner:

Can reduce the number of required file scans by up to 80% through a whitelist of proven safe applications. Files identified as safe are not rescanned until they change

Avast Script Shield:

detects malicious scripts hidden in internet pages and prevents them from running and hijacking or potentially causing damage to your computer (works on Internet Explorer and on 32 bit Windows Operating System versions only).

Avast! File System Shield:

Real-time scanning go opened/executed files

Avast! Mail Shield:

Scans all incoming/outgoing mails for malware. For Microsoft Outlook,a special plug-in is used. Other email clients are protected by a generic POP3/IMAP4/SMTP proxy.

Avast! Web Shield:

Scans all visited web pages and checks all files, pages and javascripts downloaded from the internet. Thanks to the Intelligent Stream Scan feature, the Webs shield does not slow down your browsing