Computer mouse going spaz

I am having serious issues with my mouse that is really annoying me right now. For the past several weeks the mouse has being acting up on my Windows 7 machine. I will list out what's happening below:
- The mouse is automatically highlighting text;
- If I happen to be typing (such as now), and it highlights, it deletes all or some of the text I wrote. I have to constantly press CTRL+Z (undo) to get what I typed back; and
- I might over over a link or whatever and it will automatically open it in a new tab or new window.

I have done the following:
- I have used another mouse to see whether that was the issue (it wasn't); and
- I have run several computer scans (e.g. Norton360, the free Malwarebytes, TDSSKiller and SuperAntiSpyware.

Nothing seems to work. I am getting behind in my studies because of this issue. I would appreciate any help.

P.S. This is happening all over the computer, (e.g. NotePad++, Firefox, Comodo Dragon, Microsoft Word).
Thanks.

It sounds like the synaptics touch pad sensitivity may have been changed. Go to control panel > mouse. Depending on how your computer is set up, you should see a "mouse properties" dialog box with several tabs. One of those tabs should be called either Device Settings or perhaps Synaptics. Open that tab and you should see a mind-boggling array of settings that can be adjusted. You may have to experiment to find a mid-range value for sensitivity.

You could also visit the Acer website and make sure you have the latest driver for the touchpad.

How to Reduce the Touchpad Sensitivity in an Acer Aspire | eHow.com

Driver Download

Hey marsmimar,

Thanks so much for your response!

I had a look around the mouse settings and the word "TouchPad" appeared. I decided to click disable thinking I might be putting my fingers on the TouchPad while typing. Well - the problem isn't happening anymore. It's amazing how long it's taken for me to figure out such a simple error (which happens to be a human error, not technical). Again, thanks for your help. Cheers.

Thanks for posting back. Outstanding news!