The anaerobic threshold (AT), the point at which lactic acid starts to accumulates in the muscles, is considered to be somewhere between 85% and 90% of your maximum heart rate (HRmax) .
Ultimately, Windows Defender might fail to update the definitions itself for whatever reason. In such cases you must either force a definition update by navigating to the designated tab of Windows Defender or by downloading and installing the latest signature definitions. The Windows Defender Definition Updates are offline packages containing the most recent antivirus signature for Windows Defender. Once installed, they will make sure your PC is safe from the latest known viruses, spyware, PUPs, and malicious files.
Windows 10 users have to do this. Open Settings > Update & Security > Windows Defender. Here make sure Real-time protection and Cloud-based Protection is turned off. 2] Using its UI. To disable Windows Defender in Windows 8, Windows 7 and Windows Vista, open Windows Defender > Tools > Options. Now uncheck Use Real Time Protection check box and also Use Windows Defender under Administrative Options check box. Click on Save. There is one more thing all Windows users can do.