While installing or updating Quickbooks you might see several errors, like QuickBooks Error Code 1603 Running multiple applications may result in the occurrence of Quickbooks error 1603. The error 1603 might pop up with an error message- “Error status 1603: Unable to apply the patch”.

Symptoms of QuickBooks Error Code 1603 are: 

1. Locked company file. 
2. Installation process not getting the permissions. 
3. Outdated OS version being used. 

How can QuickBooks Error Code 1603 be resolved?

Method 1:  Running QBinstalltool.exe file. 
Method 2: Repairing MSXML 4.0
Method 3: Running Quickbooks diagnostic tool. 
Method 4: Installing windows update. 

If you still feel that you are stuck on QuickBooks Error Code 1603, you can connect to QuickBooks enterprise support at +1-888-485-0289.