Were there any specific errors when you tried creating a local backup? If you received an Unrecoverable Error, here’s an article that’ll help you out:

https://community.intuit.com/articles/1021209

Resolution for '2016 locks issue: 'After latest Windows 10 update, Quickbooks Pro 2016 locks up when it tries to make a local backup. What can be done?' available: Yes.

The 2016 locks issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the 2016 locks issue yourself by looking for a resolution described in the article. If it is a complex 2016 locks issue or you are unable to solve the issue, you may contact us by clicking here or by using other 2016 locks support options.

For more information about resolving issues related to 2016 locks in Quickbooks/QBO or to get support for the issue 'After latest Windows 10 update, Quickbooks Pro 2016 locks up when it tries to make a local backup. What can be done?', click the link below: