False positive caused by the system principles of Windows
Windows uses such a way of memory administration that it will enable you to use more memory than you have in reality. However, it can cause a false positive because the virus "signatures" which are present in the "physical" memory can appear also on the disk in the "virtual" memory. Then it may happen that you will find a virus e.g. in the WIN386.SWP file (in the Windows NT system it is the PAGEFILE.SYS file). It may also happen quite often that the "normal" virus will be found in the .DOC file. Also this is the case of a false positive which you can avoid by opening the file in the Word program, selecting "Save as" and saving it under the same name. Attention! Here you must find out, whether it is not a macrovirus.