If you no longer need a program on your computer, or if it is conflicting with other programs on your system, it's a good idea to uninstall it. Most of the time, the program's uninstaller will be adequate for this. You can find that by looking for the installer file, and then selecting "uninstall." This should remove all of the files associated with that program. There may be many other programs that wound up getting installed on your system that you're not even thinking about, and are just taking up space or resources.
Kathy says she bought a new computer with McAfee antivirus, and it wants her to activate it. Should she? Leo says no way. McAfee is commonly referred to as bloatware and it's essentially advertising on her PC. Kathy will want to go into Control Panel > Apps and Features, and uninstall any program she doesn't want. The problem, though, is that many AVS programs like McAfee are difficult to uninstall completely. She may need to get an uninstaller from McAfee to get rid of it all. There already is an antivirus program built into Windows called Defender, and it's a solid program.
Mike is getting a ton of popups on his laptop that he just bought. Leo says that is likely a bunch of software included on the laptop, called bloatware. The laptop was so cheap because they can subsidize the price with adware on your computer. And there's no real answer. You could try PCDrcrapifier. Or if you have a copy of Windows, you can just format your drive and reinstall the OS.
Bill bought an Alienware PC and it has bloatware on it called MyPCBackup. He's getting annoying popups from it, and can't take it off. Leo says that this type of trialware is unfortunately how Dell makes a little extra money. There is the option of paying a little more and getting a PC without any trialware on it, so he can keep that in mind for the future.
Bruce bought an Acer computer with Windows 8 and it has a lot of bloatware. Can he delete most of the Acer apps without hurting the computer? Leo says yes, but Bruce will want to wait until he's installed the 8.1 update. Here's the link to the update: http://windows.microsoft.com/en-US/windows-8/upgrade-product-key-only