What is cidaemon.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the cidaemon.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Cidaemon.exe file information

Windows Task Manager with cidaemon
Cidaemon.exe process in Windows Task Manager

The process known as Indexing Service filter daemon or Host Process belongs to software Microsoft Windows Operating System or RapidPLUS Host Process Service by Microsoft ( or BitMicro Software.

Description: Cidaemon.exe is an important part of Windows, but often causes problems. The cidaemon.exe file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 8,192 bytes (97% of all occurrences), 9,728 bytes, 26,624 bytes or 14,848 bytes. 
It is a Windows core system file. The program is not visible. The cidaemon.exe file is a trustworthy file from Microsoft. Therefore the technical security rating is 4% dangerous, however you should also read the user reviews.

Recommended: Identify cidaemon.exe related errors

If cidaemon.exe is located in a subfolder of "C:\Program Files", the security rating is 42% dangerous. The file size is 494,592 bytes. The program has no visible window. The cidaemon.exe file is not a Windows core file.

Uninstalling this variant: If you are having problems with cidaemon.exe, you can also uninstall PoserContent2012 from your computer using the Control Panel applet Uninstall a Program or use the software publisher's support site.

Important: Some malware disguises itself as cidaemon.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the cidaemon.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Windows indexing - not a virus/trojan or anything related to one. Desktops its a pain, on file servers, quite handy.
It appears to be using 50% CPU time and might be causing problems with Outlook emails (such as blank messages).
it's installed at %AppData%\Local\Temp\iswizard05\cidaemon.exe Looks like some kind of trojan, I don't know. Looks like it has something to do with BitCoinMiner-CA.
Occasionally locks folders and makes them unable to delete or rename. Using the SysInternals (now MS) command handle.exe can reveal when the indexing process has latched onto a particular folder.
My systems goes to hang stage , because of cidaemon.exe is showing 43,176 k memory usage and 99 cpu usage in task manager
Cause This issue can occur if the Indexing service is running on the computer. The Indexing service uses the Cidaemon.exe process to index files. The Cidaemon.exe process builds and updates the Index catalog. Additionally, the Cidaemon.exe process typically uses lots of pagefile space and lots of CPU time. Back to the top Give Feedback RESOLUTIONTo resolve the issue, turn off the Indexing service. To turn off the Indexing service, follow these steps: 1.Double-click My Computer, point to Explorer Bar on the View menu, and then click Search. 2.Click Change preferences, and then click Without Indexing Service. 3.Click No, do not enable Indexing Service, and then click OK.
  Ebrahiem AlGindy   (further information)
Not dangerous, but it insists on completing its tasks before allowing the computer to download updates - at least on my machine
  Doug of the North  
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of cidaemon.exe: based on 113 votes with 9 reviews. 56 users think cidaemon.exe is essential for Windows or an installed application. 4 users think it's probably harmless. 18 users think it's neither essential nor dangerous. 19 users suspect danger. 16 users think cidaemon.exe is dangerous and recommend removing it. 7 users don't grade cidaemon.exe ("not sure about it").

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Best practices for resolving cidaemon issues

A clean and tidy computer is the key requirement for avoiding problems with cidaemon. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the cidaemon.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

cidaemon.exe [all]