What is QuickBooks error 1603 QuickBooks Software is extremely trusted and used amidst billions of users today. In the recent times, it has reached its own height of popularity which is brilliant. But it should be fair to say that it comes with many blemishes. QuickBooks error 1603 is one of them. Sometimes while updating QuickBooks, you might encounter an error called QuickBooks Update error 1603. Error Status 1603: The update installer has faced an internal error. Error Status 1603: Turn off the patch. MSI returned 1603: One of the errors that pops up while installation. Error pop-up: Install Error 1603: There was an issue installing Microsoft .NET Framework [version] or Install Error 1642: Error setting up Microsoft .NET Framework during installing QuickBooks How to solve error 1603 in QuickBooks? There are two solutions which can resolve QuickBooks error 1603. You can go from one to the other as per your convenience. Note: You may look for a consulting expert by help of your device's manufacturer. These troubleshooting steps may really help you to fix your problem. If the problems continue, contact QuickBooks technical help desk. Solution 1: Install QBinstallTool.exe file and run it First you download the 648KB file size of QBInstallTool.exe file. This will help you to fix your problem. Save this file to your desired location. Next open the file by double clicking on it to run the tool. If the error persists, we recommend you to try Solution 2. Solution 2: Fix or Repair MSXML 4.0 Step 1: Install QuickBooks in whichever way you find it easier. If you wish to install via CD: Step 2: Insert the CD into your device and also shut the QuickBooks window of installation if it opens on your display screen. Now, Follow the set of given instructions below to begin the MXSML installation for your operating system. Also Read: File extensions used in QuickBooks Windows 7 or Vista: Step 1: Go to Start Step 2: On the search field type msiexec.exe /fvaum "D:\QBOOKS\msxml.msi" and tap the enter button. If your CD drive letter is different then replace it with whatever it is. Windows XP: Step 1: Go to Run from Windows Start button. Step 2: In the blank or open field, type msiexec.exe /fvaum "D:\QBOOKS\msxml.msi" and then tap on OK. We hope that you have been able to solve your problem and thank you for visiting our site. In case you have not been able to solve your problem, contact us at QuickBooks Desktop error help number 1-877-263-2742 (Toll-Free). Tags: QuickBooks Error 1603, Error 1603 QuickBooks, QuickBooks Update Error 1603, QuickBooks Error Code 1603