searchhost.exe is a program which is most likely legit. So, if searchhost.exe is on your system, 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 run a good antivirus with a good track record, in order to yourself yourself against viruses and malware.
This program is usually stored in C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe.
The MD5 checksum for this file is 8fdbdf12a62eceb3eea12ed58f2e0f03.
This application is NOT registered as a Windows service. This is very good.
This program uses the net to communicate. Today this is expected from a program. For example, most of the apps on your PC check for new updates. For this, Internet communications are required.
searchhost.exe appears to use the functions of Windows SFC (System File Checker) or Windows File Protection.
64-bit code has been detected. This application can use the full power of a current PC processor.
File version stored as a property 421.22500.9030.0.
Author Microsoft Corporation.
Legal copyright notice © Microsoft Corporation. All rights reserved..
This application does NOT have visible windows. This is usually a bad thing.
searchhost.exe has a digital signature. Nowadays most virus-free programs are digitally signed.
The digital signature attached to searchhost.exe is valid. This is excellent.
Digital certificate name: Microsoft Windows
Certificate's issuer name: Microsoft Windows Production PCA 2011
This program does NOT have an uninstall command set up in registry.