My first PC s/w (in 1998, I think) was Win98SE... Was a bit of a revelation after struggling with Workbench.
One of the first programs I used was PaintShop Pro. I still use it (version 7.04, since it went all "photoshoppy" after that!)...
Also installed Office, etc... So much free (and good) software available...
On XP SP3 at the moment...
All freebies too... Had access to corporate editions of all of the above. Apart from that all of my other software is shareware/freeware...
Mike.