One thing about Microsoft MSFT 454,46 +2,87 +0,64% is they are persistent about reminding users of Windows 7/8.1 about the “free” Windows 10 upgrade. In the past users were presented with  pop-up Windows asking them to update to Windows 10 now or tonight. There were even notifications that Windows 10 was already installed,  just restart to finish the install. Microsoft execs have even resorted to using scare tactics that Windows 7 is unsafe and you should upgrade to Windows 10. With less than a month (25-days and counting) left before the free upgrade offer “officially” ends (there are rumors Microsoft…