Hello my name is***** will be assisting you today. I am sorry to hear that you are having such trouble. I will try my best to help you. Could you please answer the following question.
When you say Microsoft applications do you mean Microsoft office applications like Word,Outlook,Excel etc?
Which is the operating system installed in the PC.Is it Windows Vista, Windows 7, windows 8, Windows 10 or any other?
Note: - Please reply using the box below.
I am not familiar with Mac OS's.
Did you purchase this Microsoft office online and do you have the activation key for it?
Usually the CD box has the key for it could you please check in it and let me know.