If you want to repair QuickBooks damaged file, you would first have to download .exe file of QuickBooks file doctor. Once you have downloaded and installed the software, you need to follow the steps mentioned below:
 Step 1: You will have to open the file doctor tool and locate the company file
 Step 2: Now, click on ‘Diagnose now.’
 Step 3: You will have to enter the login details to start the software
 Step 4: From the prompt, you will have to choose either Workstation or server.
 Step 5: Then, choose yes or no whether you want to share the company file or not
 Step 6: The tool will start searching the errors and repair it automatically.
If you correctly follow the steps mentioned above, the issue would be resolved. But if it persists, you can get in touch with quickbooks customer support to avail assistance from the experts.
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quickbooks technical support

And how does one install a spam filter?

Someone needs to install a quickbook upside shreenmillers head. Figuratively, of course.

I thought Shreen was sacrificed to the Lord of Light in GOT Season 5?

What is your vector Victor?

Damn, and all this time I've been paying for tech support on my copy of SlowBooks.

I don't like books that aren't pop-up.