Windows Defender is good antivirus software, but only on the premise that you don't have other choices.

Every day a number of users are searching 'how to disable Windows Defender', and here are the reasons why they do it. However, even though Windows Defender is getting more aggressive and more determined in defending viruses and malware, it still failed to gain the favor of users. In Windows 11, Windows Defender received a small security upgrade that blocks vulnerable drivers from being able to run on your device. Since Windows 10, it is merged to Windows Security app and Powershell, enabling users to visit Windows Defender directly from Settings. Prior to Windows 10, Windows Defender was a graphical desktop app. No word back so far.Windows Defender, which was first released as free anti-spyware software for Windows XP, is an anti-virus component of Windows OS. I've asked Microsoft for official comment. And that the problem, introduced in signatures 1.289.1521.0 could be mitigated in signatures 1.289.1587 or newer. I'm hearing from sources that an definition update that will fix the issue should be out in the next hour or so (by 3 pm ET or so). Some System Center Endpoint Protection users also are reporting problems and have been guessing that a faulty virus definition could be the culprit. There are more reports of the same issue on the Answers site. I have no idea how many users are affected, but saw early reports of this on.

MSE is meant to protect against viruses, worms, Trojans, rootkits, spyware and more. Microsoft Security Essentials provides a fuller range of protection against malicious software than Windows Defender. I, like others reporting the issue, received a warning that my PC couldn't be scanned and my ant-malware service had stopped. I just tried running a manual Security Essentials scan on my Windows 7 SP1 desktop machine and got error message 0x800106ba. Windows 10 users don't seem to be affected. The problem is happening with some, but not all, users for the past several hours. Users are seeing their automatic anti-malware protection turned off without their knowledge and are seeing out-of-date virus definitions. A number of Windows 7 and 8.1 users are encountering problems with Microsoft Security Essentials and Windows Defender.

Turn off windows defender windows 7