Puabundler:Win32/Piriformbundler is a type of potentially unwanted application (PUA) that bundles with legitimate software downloads, often without the user's knowledge or consent. These bundles can include adware, browser hijackers, or other unwanted programs that can compromise the security and performance of a computer. Puabundler:Win32/Piriformbundler typically targets Windows operating systems and can infect computers when users download software from untrustworthy sources or fail to read the fine print during the installation process.