Solidworks Host File Block Install May 2026

Older versions of SolidWorks (2015–2019) have known bugs where they lose license validation after a Windows Update. Blocking the host files prevents Windows from forcing a re-validation that will fail.

127.0.0.1 license.solidworks.com 127.0.0.1 solidworks.com 127.0.0.1 sw.install.solidworks.com 127.0.0.1 activation.solidworks.com 127.0.0.1 register.solidworks.com 127.0.0.1 log.solidworks.com solidworks host file block install

Note: The exact domains change over time and depend on your SolidWorks version. Network monitoring is needed to find all current endpoints. Older versions of SolidWorks (2015–2019) have known bugs

127.0.0.1 updates.solidworks.com
127.0.0.1 download.solidworks.com
127.0.0.1 files.solidworks.com
127.0.0.1 solidworks-updates.com
127.0.0.1 swdownload.solidworks.com