Hi @Lars71
Greetings From McAfee.
McAfee is an Anti-Virus software which provides complete protection against viruses, online threats and ransomware with both cloud-based online and offline protection. McAfee is a premium antivirus that detects malware in real time and ensures your devices are safe. It would not cause any effects on the folder colors.
For immediate assistance kindly contact our chat support or call ( 866-622-3911)
McAfee Chat Support
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Edward Franso