Win11 build → refer: How to find the version of the operating system? → Winver.png Name, version & patch(x), x = letter, of installed Kaspersky software → on the Windows taskbar or hidden icons, rightclick the Kaspersky icon, select About? see our exampleShow content → KAVVer.png Chrome version → chrome://settings/help ? → ChromeVer.png chrome://extensions/ → Kaspersky Protection extension version ? → KPVer.png Have the Kaspersky Settings been restored to Default? → No, i don’t want. For Chrome browser, has a Reset & cleanup { chrome://settings/reset } been run ? → NO i don’t want Has the Kaspersky Protection extension been reinstalled? → No, reinstall Just system format → Install KAV → Run chrome → KP Extension Use question? → i action, “Yes” What is the actual impact of the “JS windows.onload error”, what is it stopping? → Web app, session base user login. session auto destroy delay. → actual impact? nothing. just Chrome Dev tool console error message. → stopping service or function? nothing. My system info Name : KJYDEVELOP CPU : Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz 2.90 GHz RAM 128GB System Type : 64bit OS, x64 base cpu Pen, Touch : Not exist, not support Edition : Windows 11 Pro Version : 21H2 Setup Date : 2022-01-27 OS Build : 22000.493 Experience : Windows 기능 경험 팩 1000.22000.493.0 Thank reply :)