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.

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, which has led Kaspersky to close down its US operation.

"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

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.

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

Kaspersky, the prominent Russian cybersecurity firm, began a significant transition by uninstalling its antivirus software from customers' computers in the United States.

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

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.

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

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