SolidWorks 2018 was officially released in fall 2017, long before Windows 11 arrived in October 2021. As a result, by Dassault Systèmes. Many users searching for a "SolidWorks 2018 activator for Windows 11" are likely experiencing activation or compatibility issues after upgrading their OS.
If you need further help, contact a certified SolidWorks reseller or visit the official SolidWorks forum. And always remember: no legitimate software distribution requires disabling your antivirus or running an “activator.” solidworks 2018 activator for windows 11