A friend has a PC which is neither on a network or ever on the internet. It has seldom been used but recently she can't open 'My Computer' or 'My Docum,ents'. Everything else seems to work fine. e.g. such as booting up or getting into MS Office applications.
Its hard to imagine how a virus or malware, etc got into the PC as it is an offline stand alone. So could be the possible cause of the problem?