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.

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 finishes shutdown of its US operations at the end of this month. If you’re still running its antivirus software, you’ll need to replace it.