ErrorSmart - Error Smart PC Diagnostics - Version 3.4 Advanced Diagnostics and Repair Technology ErrorSmart uses the industry's most advanced diagnostic and error repair technology. In a few short minutes, our software can scan your entire hard drive and quickly diagnose what's causing your PC complications. Once ErrorSmart has analyzed your PC and located the root of the problems, it goes to work correcting those problems, leaving you with a computer that performs perfectly.