[. . . ] To prevent an error that may cause your computer to be unusable, HP strongly recommends that you go to the Microsoft Windows Updates Web site to download all critical updates. [. . . ] Without these updates, an Unmountable Boot Volume error may occur randomly and, if it does, the error creates a blue screen with the message: A problem has been detected and Windows has been shut down to prevent damage to your computer. UNMOUNTABLE_BOOT_VOLUME. . . Technical Information: *** STOP: 0x000000ED If this error occurs, you will be unable to fix the problem without a diskette that you can order from HP Technical Support. Even after using the diskette to restore your computer, this error may continue to occur unless this update is loaded onto your HP Pavilion. 7 When the installation has finished, close all windows and restart the computer. Important: HP recommends that you use the Windows Update feature to periodically check for and download fixes for issues involving Microsoft's products. Some of these issues can include device compatibility, security, and system stability. [. . . ] Some of these issues can include device compatibility, security, and system stability. [. . . ]