He already mentioned this line "I try to remove it but all antispyware found no spyware..."

BTW, I usually do an incremental backup and just restore it when my computer gets infected by stubborn trojan/virus/malware

kerossac: Have you tried HijackThis! ?

For me the best way to deal with virus-infected PC is to format the harddrive and install the OS from the scratch. I'm a sceptic

BTW. since this is the share-your-experience in dealing with viruses thread, I would like to share mine. Err Not my PC exactly, but my officemate's. Her PC was hit by a virus few months ago. Sorry, I can't remember the virus name. The virus will DELETE some antivirus softwares like Norton, AVG, Kaspersky, etc after it infected the PC. I used Hijackthis to remove virus-suspected process that executed during the boot-up and restart the PC. Then I installed Kaspersky antivirus. The installation went fine. But I cannot use it. The virus deletes the antivirus as soon as the installation process completed. I didn't knew about this until I was wandering why the definition-updating process takes forever to complete. I did some researches and found out why. Beside deleting the antivirus softwares, the virus will modify the updating process. The updating is there, but the only things that will updated is the virus itself, not the definition files. Clever, very clever