The only way to clean your PC and prevent such PUP virus attacks is to install and use a good antivirus software that will help in providing an efficient virus scanning and virus removal process. This virus software gets installed in your system when you click on an installation without reading the fine print, thus agreeing to these extra applications. The PUP virus, also known as a Potentially Unwanted Application (PUA), junkware, or bundleware, mostly come with software that you planned to download. Potentially Unwanted Programs (PUPs) are software programs that you had no intention of downloading.