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Why are there directories called Local, LocalLow, and Roaming under \Users\<username>\AppData?

Why are there directories called Local, LocalLow, and Roaming under \Users\<username>\AppData?

I have a workstation running Windows Server 2008 that's logged into an AD domain, and I have a dual boot with Ubuntu Linux. When running Linux, I'd like to be able to use the same Thunderbird profile I use under Windows, so I pointed Thunderbird to use a profile I found under:

Asked by: Guest | Views: 144
Total answers/comments: 2
Guest [Entry]

"Roaming is the folder that would be synchronized with a server if you logged into a domain with a roaming profile (enabling you to log into any computer in a domain and access your favorites, documents, etc. Firefox stores its information here, so you could even have the same bookmarks between computers with a roaming profile.
Local is the folder that is specific to that computer - any information here would not be synchronized with a server. This folder is equivalent in Windows XP to C:\Documents and Settings\User\Local Settings\Application Data.
LocalLow is the same folder as local, but it has a lower integrity level. For example, Internet Explorer 8 can only write to the LocalLow folder (when protected mode is on).
This document from Microsoft (""Managing Roaming User Data Deployment Guide"") has a long explanation for what these three folder areas are and how they are used, as well as the changes implemented between Windows XP and Vista (Windows 7 retains the Vista structure)."
Guest [Entry]

"As explained in this blog post, The LocalLow folder (and several other Low folders) are created as an extra level of security for programs that are frequently under attack because they are exposed to the web. Internet Explorer and Adobe Acrobat are two prime examples on my system.

Essentially, a program that knows it is vulnerable can start itself in in ""low"" access mode so that it can only write into those folders and not infect the rest of the hard drive."