Try the following procedure to remove underflow issues before things get worse.
To uninstall a program from Windows XP:
1. Navigate to the Windows start menu by clicking on the "Start" button.
2. When the Start Menu opens select "Settings", then click on "Control Panel".
3. In the Control Panel window click on the "Add or Remove Programs".
4. In the "Add or Remove Programs" window select the program you want to uninstall and click in the "Change/Remove" button.
To ensure and keep a fast running speed of your pc, it is necessary to update drivers in time. Don't know to how to update Reading steps below to learn update drivers by hand. Note: the updating process is for window 7 system.
1.Right-click on Computer icon on your desktop, choose Manage.
2.Locate and click on Device Manager on the Computer Management window appeared.
3.All the devices will be shown on the right side, double-click on the category of device and find the driver you wish to update.
4.Right click on the driver, and select Update Driver Software.
5.You will see a new window appears, select Search Automatically for updated driver software.
6.When the process is finished, click Close.