Operating System: Windows 95 & Windows 98 (Note: might work with other versions of this os.)
In HP's web site you can search for this driver but sure you can't find it. Instead of the this driver you can find it's manuel and some similar useless things about the monitor.
So, I spent about 2 hours, twice, to find this driver over the internet and find out that it is located in a silly named *.exe file about monitors. I realized this while downloading all related files (even *.pdf files to find an info) about 15" monitors on HP's site.