2. Depending on your Windows version, do one of the following:– For Windows 7: Click Control Panel.– For Windows 10: Click Windows System ➙ Control Panel.3. View Control Panel by Large icons or Small icons, and then click Programs and Features.4. Do one of the following:– To turn some Windows features off, click Turn Windows features on or off. Follow theinstructions on the screen.– To remove some unnecessary programs, select the program you want to remove, and then clickUninstall/Change or Uninstall.The free memory space is insufficient.Solutions:• Right-click a blank area on the taskbar and open Task Manager. Then, end some tasks you are notperforming.• Install additional memory modules. See Chapter 7 “Hardware removal and installation” on page 63. Topurchase memory modules, go to:http://www.lenovo.comSerial connector problemThe serial connector cannot be accessed.Solutions:• Connect the serial cable from the serial connector on the computer to the serial device. If the serial devicehas its own power cord, connect the power cord to a grounded electrical outlet.• Turn on the serial device and keep the device online.• Install any programs supplied with the serial device. Refer to the documentation that comes with the serialdevice for more information.• If you added one serial-connector adapter, ensure that the adapter is installed correctly.USB device problemA USB device cannot be accessed.Solutions:• Connect the USB cable from the USB connector to the USB device. If the USB device has its own powercord, connect the power cord to a grounded electrical outlet.• Turn on the USB device and keep the device online.• Install any device drivers or programs supplied with the USB device. Refer to the documentation thatcomes with the USB device for more information.• Disconnect and reconnect the USB connector to reset the USB device.• Ensure that the Smart USB Protection function is disabled. To configure the Smart USB Protectionfunction, see “Using the Smart USB Protection function” on page 35.58 P720 User Guide
