Dear sense-- I would strongly suggest you to upgrade. It will get only harder for you to get support for outdated operating systems like Win98. As to your question--- Technically, it is possible to have more than one OS on a modern personal computer. However, each installation of the OS should have its own set of files. Most commonly, different logical partitions are created of the hard disk and each OS is assigned at least one (primary) partition, which is where it stores its system files. You probably have two different partitions of your hard disk too (Are there 'C:' and 'D:', or something else?). So, if your first installation of Win98 used C: as its primary partition, then the second installation must have used D:. Now, why do you have two operating systems on your computer that are both Win98? Usually, when people have two operating systems, they are two different OSes...such as Windows and Linux or Windows 2000 and Win XP, etc. I know some enterprise production systems use two identical OSes on the same machine for fail-over recovery, but from what you've said, it doesn't look like that's what your computer is being used for. So, certainly, getting rid of one of the two Win98s is the way to go. Now, how should you go about doing that? First of all, back up all your critical data from your computer. If you have a CD burner, put it all on the CDs, else if you have a fine network connection, FTP it to a server, or worst case, get a Gmail account (ask if you need an invitation) and compose a messages to yourself sending all your files as attachments. Then, boot up with the version of Win98 that you want to keep. Then completely reformat the other partition. If there are C: and D:, then you'll be able to format only one because it probably won't let you format the drive you're currently on, which is a good thign! You should simply be able to right click on the drive and say 'Format'. It will then create a fresh new FAT32 file system for you that you can use for data storage from your kept version of Win98. That should be all the work involved.... At least in theory. I'm sure people will add, if I've missed anything. Again, you might want to consider upgrading from Win98. +++++++++++++++++++++++++++++ As for your dump of the HijackThis log file, I do not see anything malicious going on...The processes that are reported as running look all legitimate. I think you are fine. One of the very few nice things about sticking to Win98 or prior is that most of the modern warms/viruses are so sophisticated that they don't even consider messing with old systems like Win98 worthwhile :-) So in that sense, you are quite a bit lagged behind in terms of keeping up with the technology, but then you haven't had to deal with its darker side--the endless series of security vulnerabilities that the innovations have brought along--and you havne't had to constantly learn the new shit all the time either, which, too, never seems to end. Anyways... hope it was helpful, please do let us know if things do/don?t work. Maybe the so called 'geeks' should start using a different forum in Kurakani for technology talks...just so that the rest of the folks aren't annoyed. Good day! Echoes.