Toggle Real-time protection to Off (remember to turn it back on after installation). Step 2: Run the Setup in Compatibility Mode

If CATIA crashes on startup or shows a blank screen, apply these "Updated" fixes:

Fix 2: High DPI SettingsWindows 11 scaling can make the CATIA UI look blurry. Right-click the CATIA desktop shortcut. Properties > Compatibility > Change high DPI settings.

Windows Defender often flags the CATIA installer’s legacy scripts as suspicious. Open Windows Security. Navigate to Virus & threat protection > Manage settings.

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Install+catia+v5+r21+on+windows+11+updated

Toggle Real-time protection to Off (remember to turn it back on after installation). Step 2: Run the Setup in Compatibility Mode

If CATIA crashes on startup or shows a blank screen, apply these "Updated" fixes: install+catia+v5+r21+on+windows+11+updated

Fix 2: High DPI SettingsWindows 11 scaling can make the CATIA UI look blurry. Right-click the CATIA desktop shortcut. Properties > Compatibility > Change high DPI settings. Toggle Real-time protection to Off (remember to turn

Windows Defender often flags the CATIA installer’s legacy scripts as suspicious. Open Windows Security. Navigate to Virus & threat protection > Manage settings. install+catia+v5+r21+on+windows+11+updated

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