What is conhost.exe and why does it keep showing up?

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loopkiller98

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Mar 27, 2015
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Conhost.exe is showing up and closing for less than a second.And its annoying because it minimizes my game when i play.Could it be a virus? I ran an avira rescue system scan and it found 1 threat and it deleted it.Also i ran a kaspersky full scan there were no threads detected.What could this be please help. :)
 
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Yea i saw the howtogeek website but there is no iformation.I mean this conhost.exe only appears for a sec and its not permanently in the task manager and before it didn't show like this.It has to be stopped.
 
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I uninstalled everything program that is not needed.I scanned it with Malwarebytes nothing found.Any other programs that u could suggest me for scanning ?
 
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I would doubt it would be a virus or malware at this point and not quite sure why it is causing your game to lose focus and minimize. How do you know for sure that it is that process that is causing the issue?
 
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I opened task manager and went afk and when i got back i saw the conhost.exe in processes list.And as soon as i moved the mouse it disappeared.
 
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I am not sure what the answer is but I am not sold on conhost.exe being the issue, just because it disappears and comes back doesn't necessary mean anything. I know my media player (Media Player Classic Home Cinema (MPH-HC) will tell me what the process is when the window loses focus / something else took over for a moment, which allowed me to narrow down a problem I was having (Was an older version of the Citrix Receiver I had installed). There may be programs designed to do this though instead of hey FYI this just happened.
 
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run hijackthis and post the log here.
 
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Sorry for the late reply.Here is the log from Hijack This.
Logfile of Trend Micro HijackThis v2.0.5
Scan saved at 7:45:01 PM, on 11/12/2015
Platform: Unknown Windows (WinNT 6.02.1008)
MSIE: Internet Explorer v11.0 (11.00.10240.16412)


Boot mode: Normal

Running processes:
C:\Program Files (x86)\NVIDIA Corporation\Update Core\NvBackend.exe
C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
D:\Steam\Steam.exe
D:\Steam\bin\steamwebhelper.exe
D:\Steam\bin\steamwebhelper.exe
D:\Steam\bin\steamwebhelper.exe
C:\Users\Lachk\Desktop\HijackThis.exe
C:\Program Files (x86)\Skype\Phone\Skype.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/p/?LinkId=255141
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/p/?LinkId=255141
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page = %11%\blank.htm
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\Windows\SysWOW64\blank.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre1.8.0_65\bin\ssv.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files (x86)\Java\jre1.8.0_65\bin\jp2ssv.dll
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe"
O4 - HKCU\..\Run: [OneDrive] "C:\Users\Lachk\AppData\Local\Microsoft\OneDrive\OneDrive.exe" /background
O4 - HKUS\S-1-5-18\..\RunOnce: [Application Restart #0] C:\Windows\SysWOW64\muachost.exe /RestartByRestartManager:43A9B162-FD88-4155-B6B6-2A5E31B20F27 (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\RunOnce: [Application Restart #0] C:\Windows\SysWOW64\muachost.exe /RestartByRestartManager:43A9B162-FD88-4155-B6B6-2A5E31B20F27 (User 'Default user')
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O18 - Protocol: tbauth - {14654CA6-5711-491D-B89A-58E571679951} - C:\Windows\SysWOW64\tbauth.dll
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\WINDOWS\System32\alg.exe (file missing)
O23 - Service: @%SystemRoot%\system32\DiagSvcs\DiagnosticsHub.StandardCollector.ServiceRes.dll,-1000 (diagnosticshub.standardcollector.service) - Unknown owner - C:\WINDOWS\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe (file missing)
O23 - Service: @%SystemRoot%\system32\efssvc.dll,-100 (EFS) - Unknown owner - C:\WINDOWS\System32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\fxsresm.dll,-118 (Fax) - Unknown owner - C:\WINDOWS\system32\fxssvc.exe (file missing)
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: MBAMScheduler - Malwarebytes - D:\Malwarebytes Anti-Malware\mbamscheduler.exe
O23 - Service: MBAMService - Malwarebytes - D:\Malwarebytes Anti-Malware\mbamservice.exe
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\WINDOWS\System32\msdtc.exe (file missing)
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\System32\ngcsvc.dll,-100 (NgcSvc) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: NVIDIA Network Service (NvNetworkService) - NVIDIA Corporation - C:\Program Files (x86)\NVIDIA Corporation\NetService\NvNetworkService.exe
O23 - Service: NVIDIA Streamer Service (NvStreamSvc) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\NvStreamSrv\NvStreamService.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - Unknown owner - C:\WINDOWS\system32\nvvsvc.exe (file missing)
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\WINDOWS\system32\locator.exe (file missing)
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\SensorDataService.exe,-101 (SensorDataService) - Unknown owner - C:\WINDOWS\System32\SensorDataService.exe (file missing)
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files (x86)\Skype\Updater\Updater.exe
O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\WINDOWS\System32\snmptrap.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\WINDOWS\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\system32\sppsvc.exe,-101 (sppsvc) - Unknown owner - C:\WINDOWS\system32\sppsvc.exe (file missing)
O23 - Service: Steam Client Service - Valve Corporation - C:\Program Files (x86)\Common Files\Steam\SteamService.exe
O23 - Service: NVIDIA Stereoscopic 3D Driver Service (Stereo Service) - NVIDIA Corporation - C:\Program Files (x86)\NVIDIA Corporation\3D Vision\nvSCPAPISvr.exe
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\WINDOWS\system32\UI0Detect.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vaultsvc.dll,-1003 (VaultSvc) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\WINDOWS\System32\vds.exe (file missing)
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\WINDOWS\system32\vssvc.exe (file missing)
O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\WINDOWS\system32\wbengine.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-320 (WdNisSvc) - Unknown owner - C:\Program Files (x86)\Windows Defender\NisSrv.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-310 (WinDefend) - Unknown owner - C:\Program Files (x86)\Windows Defender\MsMpEng.exe (file missing)
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\WINDOWS\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%PROGRAMFILES%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing)

 
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I don´t have time today to go through your log thoroughly, but here´s my quick look:

I don´t like the following lines which you should remove:

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/p/?LinkId=255141
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/p/?LinkId=255141
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page = %11%\blank.htm
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\Windows\SysWOW64\blank.htm


Might as well fix, the ones pointing at missing files.

O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\WINDOWS\System32\alg.exe (file missing)
O23 - Service: @%SystemRoot%\system32\DiagSvcs\DiagnosticsHub.StandardCollector.ServiceRes.dll,-1000 (diagnosticshub.standardcollector.service) - Unknown owner - C:\WINDOWS\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe (file missing)
O23 - Service: @%SystemRoot%\system32\efssvc.dll,-100 (EFS) - Unknown owner - C:\WINDOWS\System32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\fxsresm.dll,-118 (Fax) - Unknown owner - C:\WINDOWS\system32\fxssvc.exe (file missing)
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\WINDOWS\System32\msdtc.exe (file missing)
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\System32\ngcsvc.dll,-100 (NgcSvc) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (nvsvc) - Unknown owner - C:\WINDOWS\system32\nvvsvc.exe (file missing)
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\WINDOWS\system32\locator.exe (file missing)
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\SensorDataService.exe,-101 (SensorDataService) - Unknown owner - C:\WINDOWS\System32\SensorDataService.exe (file missing)
O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\WINDOWS\System32\snmptrap.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\WINDOWS\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\system32\sppsvc.exe,-101 (sppsvc) - Unknown owner - C:\WINDOWS\system32\sppsvc.exe (file missing)
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\WINDOWS\system32\UI0Detect.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vaultsvc.dll,-1003 (VaultSvc) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\WINDOWS\System32\vds.exe (file missing)
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\WINDOWS\system32\vssvc.exe (file missing)
O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\WINDOWS\system32\wbengine.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-320 (WdNisSvc) - Unknown owner - C:\Program Files (x86)\Windows Defender\NisSrv.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-310 (WinDefend) - Unknown owner - C:\Program Files (x86)\Windows Defender\MsMpEng.exe (file missing)
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\WINDOWS\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%PROGRAMFILES%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing)


I am surprised that conhost.exe isn´t in there. Try to do a search for it and tell me it´s location, and if there are multiple instances of that file.
 
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I deleted the following lines but when i scan they show up again.. The location of conhost.exe is in C/Windows/System32
 
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The location of conhost.exe is legit. And if you want to be supersure, you can check it´s properties (rightclick the file) and make sure it says "Console Window Host" under description.
If they lines pop up automatically, it may be your internet browser that is set it point to it as startup page.

Conhost is a tool that Windows uses for drag and drop commands. Since your game minimizes, there must be something that is stealing the focus of the programs. Run your games in highest priority first off all.

Give me the precise file size of conhost.exe, there is a small possibility that it may be infected with a trojan/keylogger.
 
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Size: 46.0 KB (47,104 bytes) Size on disk:48.0 KB (49,152 bytes).
 
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