近日，我在玩游戏或者看网络电视的时候，频繁出现自动切回桌面的情况，一开始，我猜想可能是病毒作怪，于是便全盘杀毒，安全模式杀毒均无建树，可是问题总是出现，而且进程里即使不开网页也有ie进程，想必是流氓软件缠身，便点击卡卡来清除，可惜只要一点卡卡便自动关机，使用黄山ie修复专家也是关机，无奈重新ghost，好在机器运行速度很快，2分钟搞定，可是没出1天就有出现如此情况，真是令人头痛，于是我便想到去瑞星反病毒论坛卡卡社区来求助，可是只要一点开这些网页，便无法链接，页面变为百度搜索，真是愁人，无奈——便想卸载卡卡重新装一下，可是就连卸载也是自动关机，我快疯了......
最后我下载了windows流氓软件清理大师，但是没有查到所谓的流氓软件，只是有几个（7）插件，卸载掉后，发现点卡卡不再自动关机而是无法找到执行链接，黄山ie修复专家则变成了以反恐游戏为打开方式，卸载后重新装均好用。不开网页进程里也没有了ie。
我发现现在的病毒、插件、流氓软件均以瑞星为矛头，要么让瑞星变成红伞，要么让你一执行瑞星杀毒就自动关机，给人一种感觉---一旦中毒，瑞星就成为了一种摆设，可叹啊...希望瑞星能够在这点上加强技术更新。
同时我也想请版主分析一下我的这种原因究竟是什么，也给我们这些对病毒只是不深的人给与帮助，能不能不要动不动就上传进程，我觉得这样虽然很直接，但是对其他人就没有太大借鉴，能否请版主把这些普遍的共性问题总结一下，面向最普通、最底层的菜虫，让我们也可以自行解决问题，
谢谢各位读这个帖子，好久没有来了，又退步了....呵呵...

玩了一会儿浩方游戏，，我的电脑再次故伎重演，因此麻烦各位高手看一下日志先，多谢各位!
启动项目
注册表
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
    <MSMSGS><; "C:\Program Files\Messenger\msmsgs.exe" /background>  [(Verified)Microsoft Corporation]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run]
    <bgoomain.exe><; >  [N/A]
    <IdnMail><; >  [N/A]
    <IMSCMig><; C:\PROGRA~1\COMMON~1\MICROS~1\IME\IMSC40A\IMSCMIG.EXE /Preload>  [(Verified)Microsoft Corporation]
    <KernelFaultCheck><; %systemroot%\system32\dumprep 0 -k>  [N/A]
    <NvCplDaemon><; RUNDLL32.EXE NvQTwk,NvCplDaemon initialize>  [N/A]
    <nwiz><; nwiz.exe /install>  [(Verified)NVIDIA Corporation]
    <runeip><; >  [N/A]
    <Skype><; >  [N/A]
    <Smapp><; C:\Program Files\Analog Devices\SoundMAX\Smtray.exe>  [Analog Devices, Inc.]
    <StormCodec_Helper><; "D:\暴风影音\Storm Codec\StormSet.exe" /S /opti>  [N/A]
    <TkBellExe><; >  [N/A]
    <yassistse><; >  [N/A]
    <YLive.exe><; >  [N/A]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
    <shell><Explorer.exe>  [(Verified)Microsoft Corporation]
    <Userinit><userinit.exe,>  [(Verified)Microsoft Corporation]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Windows]
    <AppInit_DLLs><>  [N/A]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
    <UIHost><logonui.exe>  [(Verified)Microsoft Corporation]

==================================
启动文件夹
N/A

==================================
服务
[ASP.NET State Service / aspnet_state][Stopped/Manual Start]
  <C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\aspnet_state.exe><Microsoft Corporation>
[Human Interface Device Access / HidServ][Stopped/Disabled]
  <C:\WINDOWS\System32\svchost.exe -k netsvcs-->%SystemRoot%\System32\hidserv.dll><N/A>
[Windows Update Managere / ManagereUpdate][Stopped/Auto Start]
  <><N/A>
[NVIDIA Driver Helper Service / NVSvc][Running/Auto Start]
  <C:\WINDOWS\System32\nvsvc32.exe><NVIDIA Corporation>
[Rising Process Communication Center / RsCCenter][Running/Auto Start]
  <"D:\Rising\Rav\CCenter.exe"><Beijing Rising Technology Co., Ltd.>
[RsRavMon Service / RsRavMon][Running/Auto Start]
  <"D:\Rising\Rav\Ravmond.exe"><Beijing Rising Technology Co., Ltd.>
[SoundMAX Agent Service / SoundMAX Agent Service (default)][Running/Auto Start]
  <C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe><Analog Devices, Inc.>

==================================
驱动程序
[adsrsvc / adsrsvc][Running/Boot Start]
  <\SystemRoot\System32\drivers\adsrsvc.SYS><N/A>
[aeaudio / aeaudio][Running/Manual Start]
  <system32\drivers\aeaudio.sys><Andrea Electronics Corporation>
[Rising TDI Base Driver / BaseTDI][Running/Auto Start]
  <System32\DRIVERS\BaseTDI.SYS><Beijing Rising Technology Co., Ltd.>
[DigitalChina DCN-530TX Fast Ethernet Adapter Windows Driver / DCN530][Running/Manual Start]
  <System32\DRIVERS\DCN530N5.SYS><Digitalchina Networks Limited.>
[ExpScaner / ExpScaner][Running/Auto Start]
  <\??\D:\Rising\Rav\ExpScan.sys><>
[HookCont / HookCont][Running/Auto Start]
  <\??\D:\Rising\Rav\HOOKCONT.sys><Rising>
[HookReg / HookReg][Running/Auto Start]
  <\??\D:\Rising\Rav\HookReg.sys><>
[HookSys / HookSys][Running/Auto Start]
  <\??\D:\Rising\Rav\HookSys.sys><Rising>
[IdeBusDr / IdeBusDr][Running/Boot Start]
  <\SystemRoot\System32\DRIVERS\IdeBusDr.sys><Intel Corporation>
[Intel(R) Ultra ATA Controller / IdeChnDr][Running/Boot Start]
  <\SystemRoot\System32\DRIVERS\IdeChnDr.sys><Intel Corporation>
[MEMSCAN / MEMSCAN][Running/Auto Start]
  <\??\D:\Rising\Rav\MEMSCAN.sys><瑞星软件有限公司>
[npkcrypt / npkcrypt][Stopped/Auto Start]
  <\??\D:\QQ\npkcrypt.sys><N/A>
[nv / nv][Running/Manual Start]
  <System32\DRIVERS\nv4_mini.sys><NVIDIA Corporation>
[Direct Parallel Link Driver / Ptilink][Running/Manual Start]
  <System32\DRIVERS\ptilink.sys><Parallel Technologies, Inc.>
[RsNTGDI / RsNTGDI][Running/Boot Start]
  <\SystemRoot\System32\Drivers\RsNTGdi.sys><Beijing Rising Technology Co., Ltd.>
[RSPPSYS / RSPPSYS][Running/Auto Start]
  <\??\D:\Rising\Rav\RSPPSYS.sys><Rising>
[Secdrv / Secdrv][Stopped/Manual Start]
  <System32\DRIVERS\secdrv.sys><N/A>
[SKNFW / SKNFW][Running/System Start]
  <\??\C:\WINDOWS\System32\Drivers\SKNFW.sys><N/A>
[smwdm / smwdm][Running/Manual Start]
  <system32\drivers\smwdm.sys><Analog Devices, Inc.>

浏览器加载项
[BdSearchHook Class]
  {02496EBD-8455-48db-B3C7-5DAC97D9F5A7} <C:\PROGRA~1\baidu\iexp\BDSrHook.dll, >
[百度首页]
  {02496EBD-8455-48db-B3C7-5DAC97D9F5A7} <http://baidu.com/index.php?tn=baidudg, N/A>
[@shdoclc.dll,-866]
  {c95fe080-8f5d-11d2-a20b-00aa003c157a} <, N/A>
[电台(&R)]
  {8E718888-423F-11D2-876E-00A0C9082467} <C:\WINDOWS\System32\msdxm.ocx, Microsoft Corporation>
[卡卡上网安全助手]
  {DB9ECD4F-FB8F-4311-B3CE-90B976C2707C} <C:\WINDOWS\System32\kakatool.dll, N/A>
[Recorder Control]
  {2423AB16-9F42-457B-A337-FE3B11964DB0} <C:\WINDOWS\DOWNLO~1\recorder.ocx, Bluesky Studio (http://www.bluesky.cn)>
[BlueskyVideo Control]
  {2EA6D939-4445-43F1-A12B-8CB3DDA8B855} <C:\PROGRA~1\Bluesky\BLUESK~1\v2.ocx, 蓝天工作室(http://www.bluesky.cn)>
[Share Control]
  {3072B1F1-0C4D-4E76-A7C6-FBAF129DBCC9} <C:\WINDOWS\DOWNLO~1\share.ocx, http://www.bluesky.cn>
[PP Control]
  {7005341F-8E42-47E3-987B-3DBE6288048C} <C:\PROGRA~1\Bluesky\BLUESK~1\pp.ocx, Bluesky Studio (http://www.bluesky.cn)>
[Videohelp Control]
  {75B75D86-D88B-4BEA-BC59-BFD9D7300518} <C:\PROGRA~1\Bluesky\BLUESK~1\VIDEOH~1.OCX, Bluesky Studio(http://www.bluesky.cn)>
[Filetran Control]
  {88734439-46D0-42C0-A13F-7E881EE550CF} <C:\WINDOWS\DOWNLO~1\filetran.ocx, Bluesky Studio(http://www.bluesky.cn)>
[Chat Control]
  {94EFE58C-E678-4808-AD65-24CE4B94C1FE} <C:\PROGRA~1\Bluesky\BLUESK~1\chat.ocx, Bluesky Studio(http://www.bluesky.cn)>
[Blueskyvoice Control]
  {991481A7-4669-4e15-8C24-100404E1F5CB} <C:\PROGRA~1\Bluesky\BLUESK~1\BLUESK~1.OCX, 蓝天工作室(http://www.bluesky.cn)>
[Display Control]
  {A1D97DB3-E564-4743-B2E7-6F5182CBF406} <C:\PROGRA~1\Bluesky\BLUESK~1\display.ocx, Bluesky Studio (http://www.bluesky.cn)>
[Tracechat Control]
  {A40335C4-D3D1-4E7B-9130-039CDA5B603C} <C:\PROGRA~1\Bluesky\BLUESK~1\TRACEC~1.OCX, bluesky studio>
[Blueskyvoice Control]
  {BA0F088C-72C1-475a-92F8-42391DEF6961} <C:\PROGRA~1\Bluesky\BLUESK~1\BLUESK~2.OCX, 蓝天工作室(http://www.bluesky.cn)>
[Client Control]
  {C7B0C764-5D4E-433E-A854-591F28520577} <C:\PROGRA~1\Bluesky\BLUESK~1\client.ocx, >
[Play Control]
  {CC20DDA1-9A21-4DEC-B5BE-E61E0351FCA9} <C:\PROGRA~1\Bluesky\BLUESK~1\play.ocx, Bluesky Studio (http://www.bluesky.cn)>
[上传到QQ网络硬盘]
  <, N/A>
[使用网际快车下载]
  <D:\FlashGet\jc_link.htm, N/A>
[使用网际快车下载全部链接]
  <D:\FlashGet\jc_all.htm, N/A>
[导出到 Microsoft Office Excel(&X)]
  <res://D:\OFFICE~1\OFFICE11\EXCEL.EXE/3000, N/A>
[添加到QQ自定义面板]
  <D:\QQ\AddPanel.htm, N/A>
[添加到QQ表情]
  <D:\QQ\AddEmotion.htm, N/A>
[用QQ彩信发送该图片]
  <, N/A>

正在运行的进程
[PID: 448][\SystemRoot\System32\smss.exe]  [Microsoft Corporation, 5.1.2600.1106 (xpsp1.020828-1920)]
[PID: 520][\??\C:\WINDOWS\system32\csrss.exe]  [Microsoft Corporation, 5.1.2600.0 (xpclient.010817-1148)]
[PID: 544][\??\C:\WINDOWS\system32\winlogon.exe]  [Microsoft Corporation, 5.1.2600.1106 (xpsp1.020828-1920)]
    [C:\WINDOWS\System32\SYNCOR11.DLL]  [SoundMAX, 1.2.2]
[PID: 588][C:\WINDOWS\system32\services.exe]  [Microsoft Corporation, 5.1.2600.0 (xpclient.010817-1148)]
[PID: 600][C:\WINDOWS\system32\lsass.exe]  [Microsoft Corporation, 5.1.2600.1106 (xpsp1.020828-1920)]
[PID: 760][C:\WINDOWS\system32\svchost.exe]  [Microsoft Corporation, 5.1.2600.0 (xpclient.010817-1148)]
[PID: 808][D:\Rising\Rav\CCenter.exe]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 3]
[PID: 824][C:\WINDOWS\System32\svchost.exe]  [Microsoft Corporation, 5.1.2600.0 (xpclient.010817-1148)]
    [C:\WINDOWS\System32\SYNCOR11.DLL]  [SoundMAX, 1.2.2]
[PID: 904][C:\WINDOWS\System32\svchost.exe]  [Microsoft Corporation, 5.1.2600.0 (xpclient.010817-1148)]
[PID: 920][C:\WINDOWS\System32\svchost.exe]  [Microsoft Corporation, 5.1.2600.0 (xpclient.010817-1148)]
[PID: 960][D:\Rising\Rav\Ravmond.exe]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 43]
    [D:\Rising\Rav\BWList.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 6]
    [D:\Rising\Rav\RsCommX.dll]  [rising, 18, 0, 0, 1]
    [D:\Rising\Rav\rfwctrl.dll]  [Beijing Rising Technology Co., Ltd., 5, 0, 0, 11]
    [D:\Rising\Rav\RsPPsys.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 3]
    [D:\Rising\Rav\RSAPPMGR.DLL]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 2]
    [D:\Rising\Rav\CfgDll.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 13]
    [D:\Rising\Rav\RSCOMMON.DLL]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 5]
    [D:\Rising\Rav\RsLog.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 20]
    [D:\Rising\Rav\HOOKSYS.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 0]
    [D:\Rising\Rav\Scanner.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 12]
    [D:\Rising\Rav\libload.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 16]
    [D:\Rising\Rav\VirusLib.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 10]
    [D:\Rising\Rav\regmon.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 6]
    [D:\Rising\Rav\HookWeb.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 1]
    [D:\Rising\Rav\MemMon.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 12]
    [D:\Rising\Rav\expscan.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 4]
    [D:\Rising\Rav\mPorts.dll]  [Beijing Rising Technology Co., Ltd., 4, 0, 0, 3]
    [D:\Rising\Rav\HookCont.dll]  [Rising, 19, 0, 0, 0]
    [D:\Rising\Rav\SpamEng.dll]  [N/A, 18, 0, 0, 6]
    [D:\Rising\Rav\engine.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 20]
    [D:\Rising\Rav\PostTrt.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 8]
    [D:\Rising\Rav\UnExe.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 9]
    [D:\Rising\Rav\ScanExec.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 16]
    [D:\Rising\Rav\ScanEx.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 34]
    [D:\Rising\Rav\ExtFile.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 23]
    [D:\Rising\Rav\NvFile.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 11]
    [D:\Rising\Rav\ScanMac.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 13]
    [D:\Rising\Rav\ScanSct.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 16]
    [D:\Rising\Rav\Unpacker.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 17]
    [D:\Rising\Rav\ScanPack.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 18]
    [D:\Rising\Rav\RsVM.dll]  [N/A, 19, 0, 0, 13]
    [D:\Rising\Rav\Uroutine.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 19]
    [D:\Rising\Rav\ScanNet.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 5]
    [D:\Rising\Rav\Uscript.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 17]
[PID: 1168][C:\WINDOWS\system32\spoolsv.exe]  [Microsoft Corporation, 5.1.2600.0 (XPClient.010817-1148)]
[PID: 1412][C:\WINDOWS\Explorer.EXE]  [Microsoft Corporation, 6.00.2800.1106 (xpsp1.020828-1920)]
    [C:\WINDOWS\System32\AcSignIcon.dll]  [Autodesk, 16.2.54.0]
    [C:\Program Files\Common Files\Autodesk Shared\AcSignCore16.dll]  [Autodesk, 16.2.54.0]
    [C:\WINDOWS\System32\SYNCOR11.DLL]  [SoundMAX, 1.2.2]
    [C:\WINDOWS\downlo~1\idropCHS.dll]  [Autodesk, Inc., 2, 0, 0, 40]
    [C:\Program Files\WinRAR\rarext.dll]  [N/A, N/A]
    [C:\PROGRA~1\baidu\iexp\BDSrHook.dll]  [, 1, 0, 0, 45]
[PID: 1664][C:\WINDOWS\System32\nvsvc32.exe]  [NVIDIA Corporation, 6.13.10.4104]
[PID: 1780][C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe]  [Analog Devices, Inc., 3, 2, 5, 0]
[PID: 1828][C:\WINDOWS\System32\wdfmgr.exe]  [Microsoft Corporation, 5.2.3790.1230 built by: dnsrv(bld4act)]
[PID: 368][C:\WINDOWS\System32\ctfmon.exe]  [Microsoft Corporation, 5.1.2600.1106 (xpsp1.020828-1920)]
    [C:\PROGRA~1\baidu\iexp\BDSrHook.dll]  [, 1, 0, 0, 45]
[PID: 476][D:\个人文件\Program Files\SkyNet\FireWall\PFW.exe]  [广州众达天网技术有限公司, 2.5.1.160]
    [C:\WINDOWS\System32\SYNCOR11.DLL]  [SoundMAX, 1.2.2]
    [C:\PROGRA~1\baidu\iexp\BDSrHook.dll]  [, 1, 0, 0, 45]
[PID: 252][C:\WINDOWS\System32\RUNDLL32.EXE]  [Microsoft Corporation, 5.1.2600.0 (xpclient.010817-1148)]
    [C:\PROGRA~1\baidu\iexp\BDSrHook.dll]  [, 1, 0, 0, 45]
    [C:\WINDOWS\System32\SYNCOR11.DLL]  [SoundMAX, 1.2.2]
    [C:\WINDOWS\downlo~1\idropCHS.dll]  [Autodesk, Inc., 2, 0, 0, 40]
[PID: 1812][D:\Rising\Rav\RavMon.exe]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 36]
    [D:\Rising\Rav\RsGuiLib.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 28]
    [D:\Rising\Rav\BWList.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 6]
    [D:\Rising\Rav\RSAPPMGR.DLL]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 2]
    [D:\Rising\Rav\CfgDll.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 13]
    [D:\Rising\Rav\RSCOMMON.DLL]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 5]
    [D:\Rising\Rav\RsCommX.dll]  [rising, 18, 0, 0, 1]
    [D:\Rising\Rav\RsXML.dll]  [Beijing Rising Technology Co., Ltd., 19, 0, 0, 2]
    [D:\Rising\Rav\PngDll.dll]  [Beijing Rising Technology Co., Ltd., 18, 0, 0, 5]
    [C:\PROGRA~1\baidu\iexp\BDSrHook.dll]  [, 1, 0, 0, 45]
[PID: 700][C:\Documents and Settings\dian\桌面\sreng2\SREng.EXE]  [Smallfrogs Studio, 2.3.13.690]
    [C:\WINDOWS\System32\SYNCOR11.DLL]  [SoundMAX, 1.2.2]
    [C:\PROGRA~1\baidu\iexp\BDSrHook.dll]  [, 1, 0, 0, 45]
    [C:\Documents and Settings\dian\桌面\sreng2\Plugins\SRECXTMG.SRE]  [Smallfrogs Studio, 1, 5, 0, 55]

==================================
文件关联
.TXT  OK. [%SystemRoot%\system32\NOTEPAD.EXE %1]
.EXE  OK. ["%1" %*]
.COM  OK. ["%1" %*]
.PIF  OK. ["%1" %*]
.REG  OK. [regedit.exe "%1"]
.BAT  OK. ["%1" %*]
.SCR  OK. ["%1" /S]
.CHM  OK. ["C:\WINDOWS\hh.exe" %1]
.HLP  OK. [%SystemRoot%\system32\winhlp32.exe %1]
.INI  OK. [%SystemRoot%\system32\NOTEPAD.EXE %1]
.INF  OK. [%SystemRoot%\system32\NOTEPAD.EXE %1]
.VBS  OK. [%SystemRoot%\System32\WScript.exe "%1" %*]
.JS  OK. [%SystemRoot%\System32\WScript.exe "%1" %*]
.LNK  OK. [{00021401-0000-0000-C000-000000000046}]

==================================
Winsock 提供者
N/A

==================================
Autorun.inf
N/A

==================================
HOSTS 文件
127.0.0.1                    aifind.info
127.0.0.1                    allsearcher.info
127.0.0.1                    ehttp.cc
127.0.0.1                    freednshost.info
127.0.0.1                    i-lookup.com
127.0.0.1                    www.23.la
127.0.0.1                    www.71791.com
127.0.0.1                    www.9991.com
127.0.0.1                    www.joyiex.com
127.0.0.1                    www.mj2005.com
127.0.0.1                    www.mydj2005.com
127.0.0.1                    www.nkvd.us
127.0.0.1                    www.xfreehosting.com
127.0.0.1                    www.xxx166.com

请指教，千万不要不回帖，更不要垃圾帖，谢谢

感谢你的帮忙，我的启动项目里的确很多乱七八糟的东西，但是我没敢删，只是禁止，还有我有个问题想请教， C:\WINDOWS\system32\drivers\etc\hostS 这个文件有什么用处，我试着备份后全部删除这个文件并无大碍啊，不知道这样做有没有什么别的隐患？