Some US Kaspersky security users got a big surprise when their protection was suddenly replaced by UltraAV due to a government ban. But Kaspersky’s demise has been looming for years.

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

The Russian cybersecurity company says it's been notifying users of the change and is aiming for a smooth transition of software.

Kaspersky deleted its anti-malware software from computers across the United States and replaced it with UltraAV's antivirus solution without warning.

Kaspersky announced that it would offer UltraAV as an alternative following the ban in the USA. Clients will now be switched automatically.

Some US-based users of Kaspersky antivirus products have found their software replaced by product from by a low-profile entity named "UltraAV" – a change they didn't ask for, and which has delivered them untested and largely unknown software from a source with a limited track record.

"Following the recent decision by the U.S. Department of Commerce that prohibits Kaspersky from selling or updating certain antivirus products in the United States, Kaspersky part

The Russia-based antivirus software may be now banned in the United States, but it hasn't left without a trace.

Some users have turned to online forums to report that UltraAV was installed on their computers without consent.