Features new to Windows Vista Windows Vista, Internet Explorer operates in a special "Protected Mode", which runs the browser in a security sandbox that has no access to the rest of the operating system or file system, except the "Temporary Internet Files" folder. This feature aims to mitigate problems whereby newly discovered flaws in the browser (or in ActiveX controls hosted inside it) allowed hackers to subversively install software on the user's computer (typically spyware). Internet Explorer 7 in Windows Vista also exclusively supports Advanced Encryption Standard (AES) key lengths up to 256 bits outlined in RFC 3268 and certificate revocation checking using Online Certificate
Windows Vista editions edition of Windows Vista to another. However, upgrading from a 32-bit edition to a 64-bit edition or downgrading from 64-bit edition to a 32-bit edition requires a clean install. In addition, not all potential upgrade combinations are supported. The following chart indicates the possible upgrade paths: Notes: Windows Vista editions Windows Vista—a major release of the Microsoft Windows operating system—was available in six different product editions: Starter; Home Basic; Home Premium; Business; Enterprise; and Ultimate. On September 5, 2006, Microsoft announced the USD pricing for editions available through retail channels; the operating system was later made available to retail on