The scroll bar stopped working all of a sudden... it will not scroll up, and only sometimes does it scroll down,and will get jammed scrolling down and will not stop... how can i fix this?

Go to your control panel then choose the mouse option. Under the wheel tab you should see scrolling options.

Most modern laptops with touchpads offer vertical scrolling, horizontal scrolling or both. These features are located along the right-hand and bottom edges of the touchpad, respectively, and are activated when you swipe your finger along the touchpad edge. Scrolling functionality is nearly always enabled by default, but some users find the feature an annoyance and elect to turn it off. In most cases you can simply turn the feature back on using the Windows Control Panel.

Click the Windows Start button, select "Settings," and then click "Control Panel." Double-click the icon labeled "Mouse." Select the Touchpad properties tab. The labeling of this tab varies, depending on your computer manufacturer, operating system version and the device drivers installed on your machine. Common labels include "Touch Pad," "Device Settings" and "Dell Touchpad." If you do not see this option, you may not be able to turn on scrolling for your laptop; skip the remaining steps and refer to the "Warnings" section below. Click the "Settings" button within the Touchpad Properties menu and look for the section labeled "Scrolling Settings" or similar. Enable scrolling within this section and define other scroll settings, such as scroll zone width and scrolling speed. Click "OK" to confirm your changes, and then close the Control Panel windows opened in the previous steps. The scrollbar on your laptop is now enabled.
Scroll Is Not Working With Windows 7 b> Certain computer touchpads have a vertical section on the pad itself that is used to scroll through the page or program window that you are currently viewing on your computer. If the scroll functionality suddenly stops working but the actual touchpad is still fine, this means that the part of the software for the device that controls the ability to use the scroll has been disabled. You can enable it again in the Control Panel.
Click "Start." Click "Control Panel." Click "Mouse." Select the "Enable Scroll" option (or whatever similarly named option is available on your specific model of laptop computer). Click "Apply." The scroll bar on your touchpad will now work again.

You can try removing the scroll ball and cleaning it, that could be the reason why it wont scroll up and down.

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It sounds like the touchpad needs replacing. Contact me if you can't get it repaired locally.

The keypad may need to be replaced ,if the scroll bar stopped working and everything else works ok.Probably a keypad malfunction.

mouse model a 1197, new battery still don't work

This may not be a solution for you but at least it may explain the cause of the problem. I recently had the same problem - the scroll wheel suddenly began to go crazy, jumping all the way to the bottom or the top of a document, or randomly skipping around. The unit was still under warranty, and Microsoft sent me a new mouse. Since they did not require me to return the old mouse, I decided to take it apart to see if I could find the problem. I found poorly soldered electrical joints to the optical sensor & LED which convert the scroll wheel movement to electrical signals. After I resoldered these connections the mouse worked fine again.

try to reinstall the the touch -pat and function key software one more time.

hey just format the set...it ll work..

Try uninstalling the drivers from the device manager, then do a hardware search. It will automatically find the touch pad and reinstall the drivers. If this doesn't work, then check the connector under the keyboard. Disconnect it and reconnect it, they sometimes work loose. If these don't correct the problem, then you have a faulty touch pad and you'll have to replace it.