lsass.exe is a program which is probably NOT a virus. So, if lsass.exe is on your laptop or desktop computer, it is probably ok, and will NOT be a cause for concern. Even if your PC is virus-free, it is still recommended to use a well-known antivirus with a good track record, in order to yourself yourself against threats.
Normally, this program is located in C:\WINDOWS\System32\lsass.exe.
The MD5 fingerprint for this file is 94e06d509d50807774f35bee3163e806.
This program is registered as a Windows service. This means it runs on your system in background, usually without showing anything to you. Most Windows services are ok programs, which perform useful features to other programs or to the Windows Operating System.
lsass.exe appears to have something to do with Windows SFC (System File Checker) or Windows File Protection.
This is a x64 executable. It uses the full capacity of nowadays' computer processors.
lsass.exe is digitally signed. Nowadays the large majority of virus-free programs are digitally signed.
The digital signature attached to lsass.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 an uninstall routine set up in registry.