Error msg everytime i try to install new software

[Valtam]

Welcome jwwin. I know you're frustrated but like gold_finger said, step back take a deep breath and start again. We are here to help you. You've just gone from one type of operating system to another with similarities, but not identical. Like anything new you learn in life, whether it be a new job, or your first born there will be an initial shock to the system. Take small steps