How to start System Restore by using the Command prompt

Note You must be logged on to Windows with a user account that is a computer administrator to complete these steps. To verify that you are logged on to Windows with a user account that is a computer administrator, visit the following Microsoft Web site:

http://support.microsoft.com/gp/admin

If a new program has made your computer behave unpredictably, and uninstalling the new program did not help, you can try the Windows XP System Restore tool.

10 ways to diagnose ailing PCs: Step by step

It’s a given: PCs go south and do so often. Whether it’s hardware, software, or user error, there will always be something in the way of that PC running smoothly. Problem is, there are so many things that can go wrong, it’s often difficult to know where to start to simply discover the problem.
I do a lot of remote support, so I’ve had to learn many ways to troubleshoot a sick PC without the luxury of being in front of the patient. Of course, there are countless routes to take with this process, but I thought I’d share the steps I like to follow. These are not your standard “Run your antivirus” or “Defrag the drive” approaches, either. This is the method I follow from the beginning of the phone call to the client.

How to Fix the Error "The User Profile Service failed the logon. User profile cannot be loaded."

Information
When you log on to Vista or Windows 7 using a temporary profile (user account), you receive this error message:

The User Profile Service failed the logon. User profile cannot be loaded.

For more information, see:
Error message when you log on to a Windows Vista-based or Windows 7-based computer by using a temporary profile: "The User Profile Service failed the logon. User profile cannot be loaded"