Step 1: Log in to your computer as an administrator
-But I already logged in as a different user.
-Right-click on the QuickBooks Desktop icon, then select Run as Administrator. This will change your access to administrator.
Step 2: Stop your antivirus application and rename folders
-On your keyboard, press Ctrl+Shift+Esc to open Task Manager.
-Go to the Processes tab, then look for [ANTIVIRUS].exe.
-Example: Spy Sweeper.exe.
-Select End Process.
-Rename the QuickBooks update folder.
-On your keyboard, press Windows key+E to open File Explorer.
-Go to C:\Program Files\Intuit\QuickBooks(year)\Components.
-For 64-bit users, go to C:\Program Files(x86)\Intuit\Quickbooks(year)\Components.
-Right-click on the downloadqbXX folder, then select Rename. Note that XX stands for the year version of your QuickBooks.
-Add .old to the end of the name.
Step 3: Turn off User Account Control (UAC)
-Windows 7 and 8: temporarily turn off UAC.
-Windows 10: proceed to step 4.
Step 4: Perform a clean install in Selective Startup
-For more information, see Install or uninstall Desktop in Selective Startup.