Due to recent client changes, Windows Defender has started perceiving the Launcher as a virus. However, no other major antivirus does this. Please see the below link of an online virus scan for details. https://www.virustotal.com/#/file/398f83dac9f9ef053ee0e1895f74130a1f84824bf741c17b0cdf81d47ce55289/detection
Note: Alternatively, you can add the whole folder of the installation to the exclusions.