Try going to control panel, then under hardware and sound, click mouse, then you should see mouse properties. Click on 'Buttons" and be sure the "button configuration" is set for "Synaptics touchpad V.6.2 on PS2 port 3". Let me know if that doesn't do it. You may need to reinstall your Synaptics touchpad.
To access Mouse Properties, select Start - Control Panel - Hardware and Sound -Mouse.
Use Mouse Properties in Windows to customize settings for pointing devices, such as button configuration, click speed, and pointer options.
Step 1
1. Open Mouse by clicking the Start button, clicking Control Panel, clicking Hardware, and then clicking Mouse.
2. Click the Pointer Options tab, and then do any of the following:
• To change the speed at which the mouse pointer moves, move the Select a pointer speed slider towards Slow or Fast.
• To make the pointer work more accurately when you're moving the mouse slowly, select the Enhance pointer precision check box.
• To speed the process of selecting a choice when a dialog box appears, select the automatically move pointer to the default button in a dialog box check box.
• To make the pointer easier to find when you move it, select the Display pointer trails check box, and then move the slider towards Short or Long to decrease or increase the length of the pointer trail.
• To ensure that the pointer doesn't block your view of the text you're typing, select the Hide pointer while typing check box.
• To find a misplaced pointer by pressing the CTRL key, select the Show location of pointer when I press the CTRL key check box.
Change mouse settings
http://windows.microsoft.com/en-US/windows7/Change-mouse-settings
Step 2
If you are using touchpad, try reducing the Touchpad sensitivity and check
1. Click on the "Start" icon in the lower left corner of the screen. Select "Control Panel." Next select "Mouse" under "Hardware and Sound." You can also left-click the touchpad while the cursor is anywhere on the desktop. From that screen, choose "Mouse Pointers."
2. Select the "Buttons" tab at the top of the dialog box that opens. This shows the type of touchpad device installed on your laptop.
3. Set the touchpad for right or left-handed use from this dialog box. You can adjust the double click speed of your computer as well. When you finish making any changes, click "Apply."
4. Pick the "Device Settings" tab from the dialog box now. You can see the touchpad for your Vista machine highlighted on this screen. Select "Settings."
5. Read the information provided in the next dialog box. It gives you options for tapping your touchpad, using the buttons, scrolling, pointer motion and sensitivity.
6. Make any changes you want from the various topics. When you make a change, click "Apply." Click "OK" when you finish making all your changes.
7. Do some work on your computer for a while, If the touchpad is still too sensitive, return to the "Mouse" menu and continue to adjust the settings until you get them just the way you want them.
Step 3
If the issue persists try to perform a clean boot and check whether the issue is still persists.
Follow the steps mentioned in the article given below.
How to configure Windows Vista to start in a "clean boot":
http://support.microsoft.com/kb/929135
Note:Once the troubleshooting is over, reset the computer to start as usual.
Also I would suggest you to keep in touch with mouse manufacturer
Scroll up and hit "Control Panel."
Choose "Mouse."
Click the "Device Settings" tab.
Highlight the touchpad in the list of devices. Hit the "Enable" button.
Hit the "Apply" button and hit the "OK" button.
to disable
Go to the control panel to the Mouse options and click on the Gestures tab and there is an
option that under Virtual Scrolling "Enable Virtual Scrolling" disable that option and that
should stop the auto scroll.
hope this helps
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