PSA Latest Windows Defender Definition Causing Issues 1.289.1521.0

Greetings. I'm getting error 8050800c when I try to update the definitions of Windows defender. Finished doing a clean reinstall of Windows 7 64 bits, all other updates are installed correctly. This is the only one that gives an error. I have run virus and malware scans and everything...

My Windows 7 updates recently started including Windows Defender definitions, even though I do not have Windows Defender enabled. I do use Malicious Software Removal Tool (MRT) occasionally. Does MRT use the Windows Defender definitions, or can I skip the Windows Defender updates without any...

Hi everyone! Well, as the title states, I'm not receiving Windows Defender definitions through Windows Update anymore... Until last friday, on my Windows 7 Pro x64 notebook, at every scan on tuesdays and fridays, Windows Defender had it's definitions updated via Windows Update, as "KB915597"....

I tried to run Windows Defender Offline 64 bit on a friend's laptop using WDO installed on a USB stick, but it refused to scan the disk because it insisted on getting Updates to its definitions before scanning. So either the definitions on the USB stick were too old or not present at all or...

Some reason my update for Defender has been failing since the end of April. I went to the Microsoft site and the link they give to download the file for manual installation gives me a dead link. Where are their definition files located?