Cybersecurity firm Kaspersky has uninstalled its popular antivirus software from U.S. users' computers, automatically replacing it with a completely different program from completely different company UltraAV. Kaspersky customers are not happy.

After U.S. ban, Kaspersky's American customers were automatically migrated to UltraAV antivirus, in some cases without the customers' knowledge.

Kaspersky customer handover to UltraAV has not started well, as customers found the switch was made automatically.