It is recommended that always create a backup of your data before proceeding with any advanced solutions. And to access the Integrity Check in your prior versions, you can apply the below steps:  Initially, close Sage 50 software  Next, perform a right-click on the Sage (Peachtree) icon and then select Properties  Now, keep your cursor to the far right of the Target field  Here, you have to enter a blank space and then add -i  Once you’re done then click Apply followed by the Ok button  Now, start your Sage 50 application with the icon that you have just modified  Perform a backup of the company data  After that, change your accounting period to period 1  Finally, go to the File section and then click Integrity Check.