Caused Blue Screens loops on countless computers due to faulty update in 2021
In March 2021, Kaspersky Anti-Ransomware Tool caused numerous business computers and servers to blue screen and become completely unbootable due to a faulty update. Kaspersky provided no solution and ignored the problem for months since this was "just" the free Anti-Ransomware Tool. We had to restore backup images on dozens of workstations and others had servers go down. The faulty update deleted all *.cat files in Windows making it unbootable.
Discraceful. WE WILL NEVER TOUCH ANOTHER KASPERSKY PRODUCT!
See this one of many forum posts about the chaos caused by Kaspersky - subsequently deleted by Kaspersky:
https://community.kaspersky.com/kaspersky-anti-ransomware-tool-for-business-4-0-74/any-connection-between-kart-5-3660-and-bsod-critical-service-failed-16041