searchindexer.exe is a application which is most likely NOT a virus or malware. So, if searchindexer.exe is on your PC, it is most likely ok, and will NOT be a cause for concern. Even if your system is virus-free, it is still recommended to use a good antivirus with a good track record, in order to yourself your PC against threats.
Usually, this program is located in C:\Windows\System32\SearchIndexer.exe.
The MD5 fingerprint for this file is 8d4ceaee747097a70342b80ea32e018d.
This application is a Windows service. This means it runs on your system in background, usually without displaying anything to you. Most Windows services are useful programs, which perform useful features to other applications or to the Windows Operating System.
searchindexer.exe seems to have something to do with Windows SFC (System File Checker) or Windows File Protection.
This executable runs in 32-bit mode. It can not use the entire set of features of modern PC CPUs. This ordinarily happens because the makers did not upgrade it to 64-bit code.
The description stored in the exe is Microsoft Windows Search Indexer.
File version 7.00.9600.17787 (winblue_r10.150331-1500).
Maker Microsoft Corporation.
Intellectual property rights notice © Microsoft Corporation. All rights reserved..
searchindexer.exe is digitally signed. Today most legit programs are digitally signed.
The digital signature extracted from searchindexer.exe checks out perfectly. This is excellent.
Digitally signed by: Microsoft Windows
Certificate's issuer name: Microsoft Windows Production PCA 2011
This program does NOT have an uninstall routine set up in registry.