


In many cases these specific items have been found in the past to be related to malware, but they are all really just small fragments that have matched signatures, but aren't yet truly confirmed as the specific malware that might include them.

The "Files Infected" count displayed on the Microsoft Safety Scanner, scan in progress screen or any of their other security products for that matter, is actually just a preliminary status indication that there are items which may contain malware. To truly answer your question, you need to understand how the Microsoft security apps actually operate, since that's part of why this sort of situation can be confusing to those who don't.
