The problem is my antivirus software can not remove it...
and what antivirus software is that ?
What should i do in this case?
Try remove with Malwarebytes http://filehippo.com/download_malwarebytes_anti_malware/ Superantispyware http://filehippo.com/download_superantispyware/ Dr.Web CureIt! http://www.freedrweb.com/cureit/ Norman Malware Cleaner http://norman.com/support/support_tools/malware_cleaner/