Every time that you log on to a Windows Vista-based computer that is connected to a domain, a temporary user profile is created. When you log off the computer, the user profile is deleted. Additionally, one of the following events may be logged in the Application log:

Log Name: Application
Source: Microsoft-Windows-User Profiles Service
Date: Date
Event ID: 1511
Task Category: None
Level: Warning
Keywords: Classic
User: User
Computer: Computer
Description: Windows cannot find the local profile and is logging you on with a temporary profile. Changes you make to this profile will be lost when you log off

Log Name: Application
Source: Microsoft-Windows-User Profiles Service
Date: Date
Event ID: 1534
Task Category: None
Level: Warning
Keywords: Classic
User: User
Computer: Computer
Description: Profile notification of event Delete for component {error code} failed, error code is -2147024894.

Log Name: Application
Source: Microsoft-Windows-Search
Date: Date
Event ID: 3036
Task Category: Gatherer
Level: Warning
Keywords: Classic
User: User
Computer: Computer
Description: The content source [csc://{content source number}/] cannot be accessed.