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SOLIDWORKS installation failures or hangs, particularly during activation, can often be resolved by removing blocks for solidworks.com domains within the Windows "hosts" file [1]. Users should open Notepad as an administrator, locate the file at C:\Windows\System32\drivers\etc , remove lines referencing solidworks.com, and save the file to restore connectivity [1].

: Some security software (e.g., ZoneAlarm, Webroot) specifically locks the hosts file to prevent unauthorized changes. You may need to disable "Lock Hosts File" in your antivirus settings.

or

Install SolidWorks inside a VM that has no virtual network adapter.

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