Though sometimes some issues or errors might come up that can make a great deal of annoyance while you are in the middle of important work. One such problem is “QuickBooks won’t open or QuickBooks will not open”. You can correct the problem with the below-given solutions Reasons Why QuickBooks Won’t Open? Several factors lead to “QB Desktop not starting up”. However, the problem arises when an application related to accounting software is already opened in the background. It is recommended to end the process and restart again.