sihost.exe is a application which is probably NOT a virus. So, if sihost.exe is on your system, it is probably ok, and will NOT cause problems. Even if your system is clean, we still advise you to use a good antivirus with a good detection rate, in order to defend yourself against potential security problems.
This application is usually stored on disk in C:\windows\system32\sihost.exe.
The MD5 fingerprint for this file is 442267705c1c799222ce81bb1b854d54.
This application does NOT run as a Windows service. This is normally a good sign.
sihost.exe appears to use the functions of Windows SFC (System File Checker) or Windows File Protection.
64-bit code has been detected. This program can put to good use the full power of a modern computer processor.
sihost.exe is digitally signed. Nowadays the large majority of legit software applications are digitally signed.
The digital signature found in sihost.exe checks out perfectly. This is most likely a clean, ok program.
Digitally signed by: Microsoft Windows
Certificate's issuer name: Microsoft Windows Production PCA 2011
This program does NOT have an uninstall command set up in registry.