The company seems to be based in Malaysia, serving customers in the South-East Asia: Malaysia, China, Indonesia, Vietnam and so on. Anyone who bothered to look at the current system requirements will be assured no vintage or even obsolete-but-not-vintage computer is anywhere near to run this particular software. I mean, at the very least 1 GHz Pentium IV with 256 MB RAM, 300+ MB free hard disk space and Windows 2000/XP.. not even the most clueless newbie hopefully would consider that vintage. Both my parents have worse computers than that, not to mention the PC I use for work (as a programmer!) is both slower and has less memory.
However, their web page indicates the software has been around since 1990, so there ought to exist some outdated versions that could be run on a 386 or 486. There are no links to those versions though. The page also says current software comes in DOS and Windows versions. Without knowing much about the topic, I'm sure one could write some simple software that does a bit of what this software does, but running on a much inferior, perhaps even vintage class computer.
All in all, a rather off-topic spam poster which could be made some kind of justice if the company digged out their old floppy disks with version 1.00 of the accounting software.