lsass.exe is a application which is probably legit. So, if lsass.exe is on your computer, it is probably ok, and will NOT be a cause for concern. Even if your PC is clean, we still advise you to purchase a good antivirus with a good track record, in order to yourself your PC against potential security problems.
Normally, this application is found in C:\Windows\System32\lsass.exe.
The MD5 fingerprint for this executable is 5c800e1ee62a6dee95fa7043d5964696.
This application is set up as a Windows service. This means it runs on your PC in background, usually without displaying anything to you. Most Windows services are useful programs, which perform useful features to other applications or to Windows in general.
lsass.exe seems to use the functions of Windows SFC (System File Checker) or Windows File Protection.
64-bit code has been detected. This exe can use the full power of a current computer cpu.
lsass.exe has a digital signature. Today most serious software applications are digitally signed.
The digital signature found in lsass.exe is valid. This is most likely a clean, ok program.
Digital certificate name: Microsoft Windows Publisher
Certificate's issuer name: Microsoft Windows Production PCA 2011
This program does NOT have an uninstall routine set up in registry.