Customers of Kaspersky antivirus in the United States found out in the last few days that their cybersecurity software was automatically replaced with a new one called UltraAV, according to several customers who posted on social media.

Kaspersky's antivirus software deletes itself across the US and installs UltraAV instead without notifying customers. Some are frustrated and struggling to uninstall the new program.

As Kaspersky begins its exit from the US market, it forcibly removed its software and replaced it with UltraAV, causing concern customer concern.

"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.

Kaspersky is handing the computer security of US customers to UltraAV, an "alternative" product with unknown anti-malware capabilities. The move comes after US authorities banned its

Kaspersky has secretly replaced its antivirus software on American computers with UltraAV, following its ban by the US government.

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

Kaspersky was added to the US Commerce Department's Entity List in June, which marks the firm as a threat to national security. A company or individual on that list is barred from doing business with US companies and accessing US technologies,