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 system is clean, it is still recommended to run a good antivirus with a good track record, in order to defend your PC against potential security problems.
Usually, this program is found in C:\WINXP\system32\lsass.exe.
The MD5 fingerprint for this file is bf2466b3e18e970d8a976fb95fc1ca85.
This program is registered as a Windows service. This means it operates on your PC in background, usually without showing any user interface to you. Most Windows services are ok programs, which perform useful functions to other applications or to Windows in general.
lsass.exe appears to use the functions of Windows SFC (System File Checker) or Windows File Protection.
This application runs in 32-bit mode. It does not use the entire set of features of nowadays' PC CPUs. This is quite normal because the publishers did not bother to upgrade it to 64-bit code.
The description extracted from the program is LSA Shell (Export Version).
File version extracted from the file 5.1.2600.5512 (xpsp.080413-2113).
Producer Microsoft Corporation.
Legal copyright notice © Microsoft Corporation. All rights reserved..
lsass.exe has a digital signature. Nowadays the large majority of clean software applications are digitally signed.
The digital signature attached to lsass.exe checks out perfectly. This is very good.
Digital certificate name: Microsoft Windows Component Publisher
Certificate's issuer name: Microsoft Windows Verification Intermediate PCA
This program does NOT have an uninstall command set up in registry.