I bet Slackware just cannot be the only distribution that works on it. It's very unprobable since the distributions just do not differ _that_ much
so try out some else..
For instance, if you have a cd-rw or dvd-/+rw, you could burn the Ubuntu (or Kubuntu if you like KDE or Xubuntu if you like XFCE) desktop cd (which is a Live-cd/install cd) or dvd, put it in the drive and try if it loads. If you get a working desktop, go ahead and install it - it works. If it does not, grab the possible error messages and come back here to find out why it did not run..and if it runs, it's probable that the other distributions, especially the "big ones" run too.
After all nearly every distribution evolves all the time, so old news is old news. If something didn't work in the past, it might work today.