Lenovo IdeaCentre Q150 Lenovo IdeaCentre Q150 Series User Guide V1.0 - Page 31

securely inserted into the headphone socket. • Adjust the Windows volume control - click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted. • Change audio device - click Start → Control Panel → Hardware and Sound → Manage audio devices, a sound window will pop out, click the playback tab to choose the proper playback device. 5.3 Troubleshooting software problems Problem: You are unable to exit a running program normally. Troubleshooting and problem resolution: 1. Open the Task Manager window by pressing Ctrl, Alt and Delete at the same time. 2. Select the Application tab, select the problematic program, and then click the End Task button. Problem: You need to install or uninstall a program. Problem resolution: During installation never abort the install process by powering the system off or through other drastic means. This can cause system program disorder or even failure during system initialization. During the uninstall process, never directly delete individual files or folders. This is harmful to the system, and might cause a system-wide malfunction. Use the following procedure to properly uninstall programs: For Windows XP user: 1. Back up all documents and system settings related to the program before removing it. 2. If the program has its own uninstaller, run it directly to uninstall the program. 3. If the program does not have its own uninstaller, then select Control Panel from Start menu. 4. From the Control Panel, choose Add or Remove Programs. 5. Find the applicable program in the Programs and Functions dialog box and then select Change/Remove. For Windows 7 User: 1. Back up all documents and system settings related to the program before 26 User Guide 31044392_Q150_UG_EN_V1.0.indd 26 2010.4.20 10:47:02 AM