求助,文件删不掉这个病毒Backdoor.Win32.PcClient.eay

FastUserSwitchingCompatibilityex.dll怎么删不掉啊,是这个病毒Backdoor.Win32.PcClient.eay

用户系统信息:Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; QQDownload 1.7; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506; 360SE)