Toshiba Satellite A135-S4407 User Guide 3 - Page 170

170 If Something Goes Wrong The Windows® operating system is not working 5 Verify that the AC adaptor is the correct unit for your computer model. The computer may not be able to start from an AC adaptor that is rated for less current (amperage) than the computer requires, even if the rated voltage is correct, and the plug fits correctly in the DC-IN socket. The labels on the bottom of the computer and the AC adaptor show the specifications for voltage ("V") and current ("A") for each device. The voltage level must match exactly. The amperage rating of the AC adaptor must be equal to or greater than that required by the computer. The Windows® operating system is not working Once you are familiar with the desktop and used to the way the operating system responds to your work routine, you can easily detect if the operating system is not working correctly. For example: ❖ The operating system fails to start after the initial startup appears. ❖ The operating system takes a long time to start. ❖ The operating system responds differently from the normal routine. ❖ The screen does not look right. Unless a hardware device has failed, problems usually occur when you change the system in some way such as installing a new program or adding a device. If you experience any of these problems, use the options in the Startup menu to fix the problem. Using Startup options to fix problems If the operating system fails to start properly, you may have to change your system's configuration or verify the startup procedure to fix the problem. To do this, use the options in the Startup menu. To open the Startup menu: 1 Restart your computer. 2 Press F8 when your computer starts and before Windows® starts loading. The Windows® Advanced Boot Options menu displays these options: ❖ Safe Mode ❖ Safe Mode with Networking