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Im running a test to make sure browsers connect properly to the internet like this If ProcessExists('iexplore.exe') Then ProcessClose('iexplore.exe') If ProcessExists('chrome.exe') Then ProcessClose('chrome.exe') If ProcessExists('firefox.exe') Then ProcessClose('firefox.exe') Sleep(200) ShellExecuteWait('iexplore.exe') Sleep(200) If FileExists(@ProgramFilesDir & '\Google\Chrome\Application\chrome.exe') Then ShellExecuteWait('chrome.exe') Sleep(200) If FileExists(@ProgramFilesDir & '\Mozilla Firefox\firefox.exe') Then ShellExecuteWait('firefox.exe') Sleep(200) If Not ProcessExists('iexplore.exe') Or Not ProcessExists('chrome.exe') Or Not ProcessExists('firefox.exe') Then Switch MsgBox($MB_YESNO + $MB_ICONWARNING + $MB_DEFBUTTON2, 'Browsers Check', 'Did All Browsers Work') Case $IDYES GUICtrlSetImage($BrowserIcon, $tick) RegWrite('HKEY_LOCAL_MACHINE\SYSTEM\Setup\Simple', 'Browser', 'REG_SZ', _Date_Time_SystemTimeToDateTimeStr($CuDate)) Case $IDNO GUICtrlSetImage($BrowserIcon, $cross) RegWrite('HKEY_LOCAL_MACHINE\SYSTEM\Setup\Simple', 'Browser', 'REG_SZ', 'NotCompleted') EndSwitch EndIf But it hangs like a git between ShellExecuteWait('iexplore.exe') Sleep(200) If FileExists(@ProgramFilesDir & '\Google\Chrome\Application\chrome.exe') Then ShellExecuteWait('chrome.exe') If i reduce it to this ShellExecuteWait('iexplore.exe') Sleep(200) ;~ If FileExists(@ProgramFilesDir & '\Google\Chrome\Application\chrome.exe') Then ShellExecuteWait('chrome.exe') Sleep(200) ;~ If FileExists(@ProgramFilesDir & '\Mozilla Firefox\firefox.exe') Then ShellExecuteWait('firefox.exe') Its instant but then it gives an error that firefox cant be found if its not installed Any suggestions how to stop this hanging