smss.exe is a program which is probably NOT a virus. So, if smss.exe is on your laptop or desktop computer, it is probably ok, and will NOT be a cause for concern. Even if your system is virus-free, it is still recommended to purchase a well-known antivirus with a good track record, in order to defend your system against viruses and malware.
This application is usually stored in C:\Windows\System32\smss.exe.
The MD5 fingerprint for this file is 55366cb9f41f3112de634cdb3116e563.
This application does NOT operate as a Windows service. This is normally a good sign.
smss.exe seems to have something to do with Windows SFC (System File Checker) or Windows File Protection.
64-bit code has been detected. This exe can exploit the full power of a current PC processor.
smss.exe has a digital signature. Nowadays the large majority of serious programs are digitally signed.
The digital signature extracted from smss.exe checks out perfectly. This is excellent.
Digital certificate name: Microsoft Windows Publisher
Certificate's issuer name: Microsoft Windows Production PCA 2011
This application does NOT have a removal routine stored in registry.