searchui.exe is a application which is probably NOT a virus or malware. So, if searchui.exe is on your system, it is probably ok, and will NOT cause problems. Even if your system is virus-free, it is still recommended to use a well-known antivirus with a good track record, in order to defend yourself against potential security problems.
Usually, this application is found in C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe.
The MD5 checksum for this file is b228b740b86a7e673188cb8e6f4a1caf.
This program is NOT a Windows service. This is good.
This application uses the net to communicate. In this day and age this is expected from a program. For example, most of the programs on your PC check for updates. In order to do this, Internet communications are necessary.
searchui.exe appears to have something to do with Windows SFC (System File Checker) or Windows File Protection.
This is a 64-bit executable. It uses the full capacity of modern computer processors.
The description stored in the program is Search and Cortana application.
File version 10.0.10586.589 (th2_release.160906-1759).
Maker Microsoft Corporation.
Legal copyright © Microsoft Corporation. All rights reserved..
searchui.exe has a digital signature. Today the large majority of virus-free software applications are digitally signed.
The digital signature extracted from searchui.exe verifies as ok. This is excellent.
Digitally signed by: Microsoft Windows
Certificate's issuer name: Microsoft Windows Production PCA 2011
This executable does NOT have an uninstall command stored in registry.