Please restart your machine and re run the installer.

Hi, Samnet30.

I'm here to help. I recommend first getting a fresh install file from this link here. Once installed use the Install Diagnostic Tool, located in the tool hub under Installation Issues. This will check over all the components that work alongside with the QuickBooks program. Run the QuickFix tool after the Install Diagnostic Tool is finished running. This will close down all background processes for QuickBooks. Now that these steps are done, try running the new Installation .exe you downloaded from our first step. If for any reason you get the same error please let me know. I am determined to help you get your software installed and running. I'm only a post away.

Hi - thank you for the reply, I am on the PC remotely now and will post shortly how it goes.

Thank you

I am proceeding forward with the exception of running the Quickfix Tool - I cannot find this tool and at this time do not know what this is. Please reply if you are available and if you could provide a link to the above mentioned tool that would be great. Note I have downloaded and ran the QuickBooks Desktop Tool Hub for installation errors.

I ticked on .NET Framework 3.5 and rebooted but the installer still wouldn't complete. Is there something else that I have to do that I'm missing?

I'm installing Quickbooks and had the same issue. I ticked on the NET framework 3.5 and rebooted, but I'm having the same issue. Is there something else I'm missing. To be clear, I'm not downloading QB Enterprise. I'm downloading QB Premier - Contractor Edition. My install wizard says Quickbooks Financial Software 2019 R7. Don't know if that matters.

@readh 

Login to your CAMPS and make sure what your license code is and which QB Desktop version you have. If the same error persists, try to install the trial license of QBD 2020 as the workaround. 

I had this issue, and here's what worked for me.

For safety reasons, I don't log in on the admin account. There is almost NEVER a reason to do this.

I'd tried running this as a Standard User - doing it this way did not give the message that I need to reboot.

I'd tried while logged in as a Standard User right clicking and "Run as Administrator." This is when I'd get the continuous You need to reboot message loop.

Finally, I logged out, signed in as Administrator, ran Quickbooks as administrator, received the message, rebooted, and then signed in AGAIN as Administrator. Ran Quickbooks and it worked!

Logged back out, tested it as standard user, and everything is working properly.

Logging into the computer as administrator also fixed it for me.

None of the posted suggestions worked for me, so this is what I did:  Go into Add/Remove Programs, click QuickBooks, and click "Change" option - then do a Repair.  Let it do the repair and reboot.  Then run QB - it recognizes there is a new version and successfully installed it.

These steps exactly fixed it for me.  Would've never thought to do a double administrator sign-in, wow.  You a real one @intuìtsucks