Career, quit job, run business

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I am working as an executive with a insurance company for 15 years and had been reward for excellency for a few times. But now, after the company change their computer system, i found that work we are doing becoming so horrible because there ar no solutions in their accounting records. Poorly, the superior ( managment ) is still saying that we have to rely on the system. I feel so happy about it and now i have decided to quit my job and run my on business. But running business it is not an easy job because i am lack of capital and experience. So, i need suggestions either to quit or keep on with the job job ?