When I upgrade my QuickBooks desktop, I am obtaining error code message QuickBooks error 1603. This error code is one such error that thousands of users are experiencing it on a regular basis. At the time of updating QuickBooks, I am experiencing this error code again and again. Hence, I am not able to work on my QuickBooks software. This error code is happening due to many reasons. I don’t have ideas about this error code. I am new to this error code, hence I am not able to resolve this error code. Can you provide the solid ways to fix this error code?