no it does not.
It depends on what computer you have for wizard101 to mess up your computer.
depends on what you download can limewire mess up your computer
if you use it improperly, it can very well mess up your computer.
Minecraft doesn't mess up your computer. Minecraft is a malware free program.
You can easily get into the Gmail which was on your computer. Gmail is not computer specific service. It can be opened on any computer with Internet.
Gmail lets you sign up every time. It could be because you are entering wrong details. It could also mean that your internet connection is a mess.
NO
No it cannot
Not that I know of, but it might mess up your game if you input too much.
If the Windows is messed up, then yes. It will mess the computer up.
No