I've loaded the maximum security 2017 on 11/27/2016 on my desktop and completed a confirmation and a scan plus I pushed it over to one of my tablets (Surface Pro4) . Today I opened my desktop and Maximum Security 2017 was completely missing from my Desktop. I found this out because I received a msg from Microsoft requesting for a scan from their Windows Defender - a free virus protection for systems w/o computer security. Note: FYI, my Surface Pro4 tablet still has the Max Sec 2017 load I had pushed from my desktop on 11/27/2016. Very frustrating after I spent a good hour following the instructions and doing the 5 step uninstall/reinstall on my desktop. Request immediate tech support on this problem.