tiworker.exe is a application which is most likely NOT a virus. So, if tiworker.exe is on your system, it is most likely ok, and will NOT be a cause for concern. Even if your PC is clean, it is still recommended to use a good antivirus with a good detection rate, in order to defend your system against viruses and malware.
This program is usually found on disk in C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.10586.570_none_7645b09c266beb53\TiWorker.exe.
The MD5 checksum for this file is 1ece8a9aec80c3311eac74454766b7ad.
This program does NOT run as a Windows service. This is normally a good sign.
This is a 64-bit executable. It uses the full capacity of modern CPUs.
The description extracted from the exe is Windows Modules Installer Worker.
File version extracted from the file 10.0.10586.0 (th2_release.151029-1700).
Publisher Microsoft Corporation.
Legal copyright notice © Microsoft Corporation. All rights reserved..
tiworker.exe is digitally signed. Today the large majority of virus-free software applications are digitally signed.
The digital signature attached to tiworker.exe is valid. This is excellent.
Digital certificate name: Microsoft Windows
Certificate's issuer name: Microsoft Windows Production PCA 2011
This executable does NOT have an uninstall routine stored in registry.