Kaspersky’s close ties to the Russian government were found to pose a critical risk, the person said, adding that the software’s privileged access to a computer’s systems could allow it to steal sensitive information from American computers, install malware, or withhold critical updates. The Biden administration on Thursday will announce plans to bar the sale of Kaspersky Lab’s antivirus software in the United States, a person familiar with the matter said, citing the firm’s large U.S.