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I suppose the issue is in the incompatibility of antivirus software drivers on hardware level.
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I would like to add that I had the same antivirus issues using another computer, I had McAfee antivirus installed on it and had to complete all steps described above first. Actually I was asked to uninstall Webroot security center first then (after PC reboot) the program itself, then another reboot so a little advice here would be to uninstall any antivirus or antispyware software before downloading BitDefender Total Security 2017 installation file using Windows program uninstall option. I faced issues myself as I run Webroot Antispyware so I was asked to uninstall it first. Starting from the installation you may face not very pleasant surprises if you run any other antivirus and antispyware software. The trial version is a full package and depends on the serial number you use during the activation.
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It seems that there is only one installation file for all three versions: antivirus, internet security and total security. I was little confused as the download file had bitdefender_antivirus.exe ending and I was going to install Total Security 2014 version. First of all you should download the file from Bitdefender website about 628 Kb and run it. I would like to start BitDefender Total Security 2018 review from the very beginning, from downloading the installation file.
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