I have a very strange problem.
I own a Lenovo ThinkPad E530c. At one point in its life, the left click on the touchpad simply decided to stop working. That keyboard-bound left-click button also did not work. Right click worked fine.
As I don't use my laptop very often (and when I do, I use a mouse, where both clicks were working fine), I practically forgot about the problem thinking it was probably a driver issue and I was too lazy at the time to figure it out.
Fast forward to today. I boot up my laptop and remember that it didn't work. I tried reinstalling the drivers (nearly fresh copy of W7, by the way), that did not help. I figured windows must have messed something up, so I booted an Ubuntu Live CD. Sure enough, both clicks worked fine.
I then installed Ubuntu, and lo and behold, after installation, neither touchpad-click, nor the keyboard-button click for left clicking did not work (on Ubuntu). And get this... The left click did not work on my USB mouse either.
Summa summarum, there is no way for me to left click on Ubuntu, and I can only left click with my mouse on Windows 7.
What the hell could be going on? I plan on installing Arch tomorrow to see if that will help it, but this is a very odd problem I believe.