When I see this I try TWO THINGS.
1. Boot off my USB stick with UBUNTU and try it.
2. Scan like Grif told me to at a link to follow,
I've been having this problem for about 2 days now. At random moments for extended periods of time, my mouse clicks will simply not respond in correct ways. Sometimes it will just simply not click at all (neither the right or the left clicker will respond), sometimes it will automatically click for me (both left and right at different times), and other times it will right click when I try to left click. My scroll works perfectly, it's just that at random moments my mouse will not respond appropriately.
I've found that sometimes if I right click multiple times, it will enable me to start clicking again.
And this is not a mouse problem, it's my laptop. This will happen with my mouse and my mouse pad/touch pad.
I also found that if I go to a new window via alt+tab, it will enable me to use my mouse again, but it rarely happens.
Please help if you can