The Securities and Exchange Commission and Texas Attorney General Greg Abbott accused two Texas men of hijacking personal computers across the country to send mass e-mails and inflate prices on at least 13 stocks. Darrel Uselton, 40, of Katy, and his uncle, Jack Uselton, 69, of Houston, cheated investors out of about $4.6 million by infecting computers with bot viruses that forward spam e-mails to tout shares, the SEC said in a statement.