When this behavior occurs, Windows Vista is running in reduced functionality mode. When Windows Vista is running in reduced functionality mode, the taskbar does not appear. Additionally, you have limited access to Windows Vista programs and features.
This article describes how to install Windows Vista Service Pack 1 (SP1) when Windows Vista is running in reduced functionality mode because the activation period has expired. After you install Windows Vista SP1, you can access data.
Important If you install Windows Vista SP1 while Windows Vista is in reduced functionality mode, you cannot uninstall Windows Vista SP1.
- Log on to the Windows Vista-based computer.
- After the message that is mentioned in the "Symptoms" section appears, click Access your computer with reduced functionality.
- In Internet Explorer, type one of the following URLs in the Address bar:
Windows Vista, 32-bit versionsWindows Vista, 64-bit versions
- Follow the steps to download and to install Windows Vista SP1.
Article ID: 947874 - Last Review: Jun 10, 2011 - Revision: 1