Can I obtain relief from QuickBooks unexpected error 5?

I am running a small business of real estate in my location. I am working as a real estate agent. On daily basis, I try to maintain the customer transaction details, so I use QuickBooks, accounting tool for keeping a record of my all business dealings. Unluckily, I am experiencing QuickBooks unexpected error 5 from last week, so I am worrying about it.  I don’t have exact reasons of this error code and why it is happening. It is so frustrating for me that I can’t express in my words. It is creating a lot of troubles for me, so I am unable to do work on my software. So please someone guide me easy ways to get the relief from QuickBooks unexpected error 5.