Just when I thought I was getting the hang of it, nothing but problems.

1)How do I remove/delete/un-install software/programs/drivers. I found the Programs & Software icon in control panel that gives you the option of remove/repair or install. I thought that would work. My problem... everytime I try and remove something, I re-boot to flush out the memory then attempt to re-install. Next thing i know, I'm being told software is already installed. Last week something got messed up and i lost my video and sound drivers. I tried re-installing them, but everytime I tried I got a notice that they were already installed. I had to use system restore and go back to an earlier time to get them working again.