windows defender windows 7 will not start

Collateral damage? Or deliberately switched off by Microsoft, so 'by design'?īut why can definition updates be obtained via the separate updater in Defender? You don't know. Since the installation of KB4284867 no updates for Windows Defender are detected. Immediately before installing KB4284867 (Security Only) Windows Defender received his last definition update. What happened on 18/06? – On 18/06 I started installing the updates from June patchday (a little late) on my private Win 7 computer. The Windows 7 Defender was and is activated and was regularly supplied with current definition updates via Windows Update until June 18. I'll follow up with a little thesis: On my computer, the Windows 7 Defender runs parallel to a 'full-fledged' AV product. German blog reader Ralf Lindemann posted a comment with a strong hint: But gladly my German blog readers helped to nail it down. Searching the web I didn't found other posts or an explanation at first. I receive the feedback from my German blog readers, that Malwarebytes antivirus and some other antivirus vendors allows Windows Defender running in parallel. Depending on the installed third party anti virus software, this situation may be different und Windows Defender is enabled.

The German text says, that Windows Defender is deactivated (disabled). Calling Windows Defender via start menu's search box ends here with the following message box. I tried to check this issue on my Windows 7 machine, where also Microsoft Security Essentials is installed. In normal cases Windows Defender is disabled And I found a few minutes ago this forum post at (which triggered my decision, to write this blog post). They observed a similar behavior – Windows Defender didn't receive updates automatically. Shortly later I received confirmation from other users. Very strange! Has anyone else observed this problem? After clicking on 'Check for updates now' 1.271.193.0 from Jwas installed at 21:10. Now I started the Defender once and the last version of the definitions was 1.269.1075.0 from June 11, 2018, 16:50 o'clock (German time). The strange thing is that every Friday I have the Defender do a quick check and have it set up so that it checks for updates and installs them right away. I just started an extra Windows update manually again, although it already ran automatically 3 hours ago, and again nothing. Here is his comment, which I've translated:Ī little off topic, but I've noticed under Windows 7 since days that Windows Update doesn't report Defender updates anymore, because it doesn't find any via Windows Update.

After I posted the blog post Windows Defender meldet fälschlich Trojaner (English version here), a German blog reader mentioned an observation.

Windows defender windows 7 will not start