If you want to switch to another provider’s product, turn off all Windows Defender features as follows:

Many security programs are not compatible with one another and block each other’s protective features when used simultaneously. It’s also not advisable to run multiple antivirus programs at the same time. That’s because without active anti-virus protection, you’re exposed to a massive security risk. But don’t disable Defender unless you have another antivirus program ready to be installed. If you’d like to use a different antivirus program than Windows Defender, you’ll need to turn off Windows Defender which is automatically activated in Windows 10.