avast odinstalovat. odstranit pozostatky a nainstalovat iny AV.
napr. http://www.comodo.com/home/internet-security/free-internet-security.php?key5sk1=6afe3e6d784dafb05c4a764b95d3d0fda528daf7&key5sk2=&key5sk3=1370526575000&key5sk4=&key5sk5=1370526579000&key6sk1=&key6sk2=FF210&key6sk3=5&key6sk4=sk&key6sk5=SK&key6sk6=0&key6sk7=Google&key6sk8=117700&key6sk9=1024768&key6sk10=false&key6sk11=c2488d6c1d06a08b888f4da7f23ce936d4c89161&key6sk12=2034&key7sk1=19&key1sk1=ors&key1sk2=Google