Many free installers include "PUPs" (Potentially Unwanted Programs) like adware or browser hijackers that can slow down your PC.
Often, the most reliable "verification" comes from other users. Look for recent comments regarding the file’s functionality and safety. freeforfilecom verified
Before opening any download, upload the file to VirusTotal . It checks the file against dozens of different antivirus engines. freeforfilecom verified