A Potentially Unwanted Program (PUP)
is a very broad threat category which can encompass any number of different programs to include those which are benign as well as malicious. Thus, this type of detection does not always necessarily mean the file is malware or a bad program. PUPs in and of themselves are not always bad...many are generally known, non-malicious but unwanted software. PUPs are considered unwanted because they can cause undesirable system performance or other problems and are sometimes installed without the user's consent since they are often included when downloading legitimate programs. They may also be defined somewhat differently by various security vendors but PUPs are not
Further, you should never follow specific instructions provided to someone else
especially if they were given in a forum which provides help with malware removal like this one. Those instructions were given under the guidance of a trained staff helper to fix that particular member's problems, NOT YOURS after careful evaluation of the malware involved. Before taking any action, the helper must investigate the nature of the infection and then formulate a fix for the victim. Although your problem may be similar, the solution could be different based on the kind of hardware, software, system requirements, etc. and the presence of other malware which means the degree of infection can vary.