It was a pre-built and was too long ago for me to mention hardware, but remained stock through its entire life. Given the amount of issues I had with 95 (towards the end it would crash, on the dot, every four hours), I was more than happy when a more stable OS came along. Even after reformating the computer and installing 95 fresh, it still had issues.
I never dealt with 98, so I can't say anything about that, but if I recall, mom toyed with installing 98 over the 95 and it cleared up a number of the stability issues.
You know. People claim about kinks and random crashes on Vista. I've never experienced any with any frequency. What few things I have can be passed off as random hiccups which no OS is immune to.