Not necessarily, if you know what the program is going to do and you are absolutely sure you know what you are installing on your computer.
Installing a program.
You can block logical ports to invaders and make your computer invisible to others on the Internet by installing
Installing DDR SDRAM on your computer will actually make your computer run faster,and will make it easier to run multiple applications at once.
They hurt them by they attack any thing you have on the computer to get to your personal things.
Someone can avoid installing adware spyware programs on their computer by avoiding installing random things from the internet and only installing things from the official website of a program. Also, install an antivirus program on your computer.
It all depends on what you installed.
Yes, you can soup up (upgrade) the features/capabilities of your computer. You can do this by installing a faster CPU, adding memory and/or installing more devices.
no
By not downloading it.
installing it back
You can not install a PS2 on a computer with a password
because i need to inwstal professionalplus 2010 in my computer.