– 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. Refer to “Installing or replacing hardware” on page 96. To purchasememory 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 theserial device for more information.• If you added one serial-connector adapter, ensure that the adapter is installed correctly.USB device problemsA 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.The Windows 7 operating system cannot be installed from an external optical drive or an externalUSB device.Solution:Go to https://support.lenovo.com/us/en/documents/ht104142 for more information.Software and driver problemsFor some programs, dates cannot be sorted in correct order.Solution:82 ThinkStation P410 Hardware Maintenance Manual