---
title: "4. Error \"Code: 1603\" when updating SOLIDWORKS"
description: "How can I resolve the "Code: 1603" error when installing SOLIDWORKS?"
---

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June 29, 2026

# 4. Error "Code: 1603" when updating SOLIDWORKS

## How can I resolve the "Code: 1603" error when installing SOLIDWORKS?

### Problem :

When you launch the SOLIDWORKS installation, the error message "**Code: 1603**" appears and you cannot continue.

![1603](https://hub.ohmycad.com/hs-fs/hubfs/1603.png?width=670&height=374&name=1603.png)

### Causes and solutions:

#### 1. Traces of old software

This error message may appear following the detection of traces of old software (SOLIDWORKS or other 3D design software) on your computer.

**Resolution**:  
Follow the SOLIDWORKS [advanced uninstall procedure](https://hub.xdinnovation.eu/en/knowledge/clean-uninstallation-of-solidworks-connected).

#### 2. Computer protection

Another possibility is that protection (antivirus, ransomware protection, etc.) is activated on the computer and blocks the installation.

**Resolution**:  
Deactivate the blocking protections.

### Report this problem!

**a. Problem solved?** Let us know so that we can prevent it from happening again!  
**b. Still not working?** Contact us too!

Contact :  support@ohmycad.com