We have a team of QuickBooks experts and IT professionals who can help you quickly resolve QuickBooks error 61. When you install the damaged or corrupted QB company files, or there is any malware or virus attack on your QB software, this problem occurs. To resolve this issue, you will need to use QuickBooks data rebuild, from the file menu select Utilities and then choose Data rebuild. After that you will see a message QuickBooks is not responding, and wait for the next notification Rebuild has completed, click Ok over it. Now you can try relaunching the QuickBooks desktop and verify if the problem resolves. Another solution is downloading the Reimage repair tool, then click Yes on the installation process, further select Start Repair. If you are still facing QuickBooks error 61 problems, then contact our QB experts.