Some adware or homepage kidnap software may using chrome policies, after clearing the extensions and temp, cache, even reinstall chrome cannot solve the problem, you may try this.
create this batch file and run as admin. Or run cmd as admin then cd to this file location and execute.
@echo off IF NOT EXIST %WINDIR%\System32\GroupPolicy goto next echo Deleting GroupPolicy folder... RD /S /Q "%WINDIR%\System32\GroupPolicy" || goto error echo. :next IF NOT EXIST %WINDIR%\System32\GroupPolicyUsers goto next2 echo Deleting GroupPolicyUsers folder... RD /S /Q "%WINDIR%\System32\GroupPolicyUsers" || goto error echo. :next2 gpupdate /force pause exit :error echo. echo An unexpected error has occurred. opened the program as an administrator (right click, run as administrator)? echo. pause exit