Well, if the program found no errors, you might think it had not done its job and was useless.
If it had found twice as many errors, would you think it was doing an even better job?
It reminds me of those registry cleaning applications that always find errors that are perfectly harmless and then want to charge you to fix the errors.
Trust your own impressions and experience on the PC. If it's working OK as it always has, any "errors" can't be significant.
It's not like it's trying to point out impending hardware failures or dangerous situations, such as virus infections.