下载IFEO修复程序
http://www.dodudou.com/down/IFEO.rar首先用以上工具修复
1.建议使用XDelBox删除以下文件：(
XDelBox1.6下载)
使用说明：删除时复制所有要删除文件的路径，在待删除文件列表里点击右键选择从剪贴板导入，导入后在要删除文件上点击右键，选择立刻重启删除，电脑会重启进入DOS界面进行删除操作。运行xdelbox前最好卸载所有可移动存储介质（包括U盘，MP3，手机存储卡等）。
c:\windows\system32\sysave.exe
slserv.exe
c:\1f4450d8be85aff4.dat
c:\windows\system32a2.sys
c:\8e53f9f4b1fd5aaa.dat
c:\f1f5064c49aa89bc.dat
2.删除重启后使用SREng修复下面各项： 启动项目 －－ 注册表之如下项删除：
[{4BAB150F-DD97-476D-9C1E-41B6CDC0CA7A}] <>
[{E568441B-9EF3-49F8-9A67-4141AC41ADD4}] <>
[IFEO[avp.exe]] <svchost.exe>
[IFEO[CCenter.exe]] <svchost.exe>
[IFEO[ccEvtMgr.exe]] <svchost.exe>
[IFEO[ccSetApp.exe]] <svchost.exe>
[IFEO[ccSetMgr.exe]] <svchost.exe>
[IFEO[DefWatch.exe]] <svchost.exe>
[IFEO[FWMon.exe]] <svchost.exe>
[IFEO[KAVStart.exe]] <svchost.exe>
[IFEO[kavsvc.exe]] <svchost.exe>
[IFEO[KPfwSvc.exe]] <svchost.exe>
[IFEO[KVMonXP.exe]] <svchost.exe>
[IFEO[kvsrvxp.exe]] <svchost.exe>
[IFEO[KVStub.kxp]] <svchost.exe>
[IFEO[kvupload.exe]] <svchost.exe>
[IFEO[KVWSC.exe]] <svchost.exe>
[IFEO[KvXP.kxp]] <svchost.exe>
[IFEO[KvXP_1.kxp]] <svchost.exe>
[IFEO[KWatch.exe]] <svchost.exe>
[IFEO[KWatch9x.exe]] <svchost.exe>
[IFEO[KWatchX.exe]] <svchost.exe>
[IFEO[loaddll.exe]] <svchost.exe>
[IFEO[MagicSet.exe]] <svchost.exe>
[IFEO[McAgent.exe]] <svchost.exe>
[IFEO[mcconsol.exe]] <svchost.exe>
[IFEO[mctskshd.exe]] <svchost.exe>
[IFEO[mcupdmgr.exe]] <svchost.exe>
[IFEO[mmc.exe]] <svchost.exe>
[IFEO[mmqczj.exe]] <svchost.exe>
[IFEO[mmsk.exe]] <svchost.exe>
[IFEO[msconfig.exe]] <svchost.exe>
[IFEO[NAVSetup.exe]] <svchost.exe>
[IFEO[nod32kui.exe]] <svchost.exe>
[IFEO[PFW.exe]] <svchost.exe>
[IFEO[PFWLveUpdate.exe]] <svchost.exe>
[IFEO[QHSET.exe]] <svchost.exe>
[IFEO[QQDoctor.exe]] <svchost.exe>
[IFEO[QQSC.exe]] <svchost.exe>
[IFEO[ras.exe]] <svchost.exe>
[IFEO[Rav.exe]] <svchost.exe>
[IFEO[RavMON.exe]] <svchost.exe>
[IFEO[Ravmond.exe]] <svchost.exe>
[IFEO[RavStub.exe]] <svchost.exe>
[IFEO[RavTask.exe]] <svchost.exe>
[IFEO[RegClean.exe]] <svchost.exe>
[IFEO[regedit.exe]] <svchost.exe>
[IFEO[rfwcfg.exe]] <svchost.exe>
[IFEO[RfwMain.exe]] <svchost.exe>
[IFEO[rfwProxy.exe]] <svchost.exe>
[IFEO[rfwsrv.exe]] <svchost.exe>
[IFEO[RsAqent.exe]] <svchost.exe>
[IFEO[Rsaupd.exe]] <svchost.exe>
[IFEO[rtvscan.exe]] <svchost.exe>
[IFEO[runiep.exe]] <svchost.exe>
[IFEO[safelive.exe]] <svchost.exe>
[IFEO[scan32.exe]] <svchost.exe>
[IFEO[shcfg32.exe]] <svchost.exe>
[IFEO[SmartUp.exe]] <svchost.exe>
[IFEO[SREng.exe]] <svchost.exe>
[IFEO[symlcsvc.exe]] <svchost.exe>
[IFEO[SysSafe.exe]] <svchost.exe>
[IFEO[TrojanDetector.exe]] <svchost.exe>
[IFEO[Trojanwall.exe]] <svchost.exe>
[IFEO[TrojDie.kxp]] <svchost.exe>
[IFEO[UIHost.exe]] <svchost.exe>
[IFEO[UmxAgent.exe]] <svchost.exe>
[IFEO[UmxAttachment.exe]] <svchost.exe>
[IFEO[UmxCfg.exe]] <svchost.exe>
[IFEO[UmxFwHlp.exe]] <svchost.exe>
[IFEO[UmxPol.exe]] <svchost.exe>
[IFEO[UpLive.EXE.exe]] <svchost.exe>
[IFEO[WoptiClean.exe]] <svchost.exe>
[IFEO[zxsweep.exe]] <svchost.exe>
启动项目 －－ 服务 －－ Win32服务应用程序之如下项禁用：
[SmartLinkService / SLService] <slserv.exe>
启动项目 －－ 服务－－ 驱动程序之如下项禁用：
[1f4450d8be85aff4 / 1f4450d8be85aff4] <\??\C:\1f4450d8be85aff4.dat>
[R2A / R2A] <\??\C:\WINDOWS\system32a2.sys>
[8e53f9f4b1fd5aaa / 8e53f9f4b1fd5aaa] <\??\C:\8e53f9f4b1fd5aaa.dat>
[f1f5064c49aa89bc / f1f5064c49aa89bc] <\??\C:\f1f5064c49aa89bc.dat>
然后对于3721，下载windows清理助手清理恶意软件
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