Pai poate ai virusi si de asta, incearca sa folosesti utilitarele astea:
http://www.softpedia.com/get/Antivirus/Kaspersky-Virus-Removal-Tool.shtml
http://www.bleepingcomputer.com/download/combofix/
http://www.softpedia.com/get/Antivirus/Malwarebytes-Anti-Malware.shtml
mai curata-l de fisiere temporare, iti recomand ccleaner http://www.softpedia.com/get/Security/Secure-cleaning/CCleaner.shtml si defragmenteaza-l, iti recomand cu http://www.softpedia.com/......frag.shtml