I have a similar problem sometimes. Netscape will freeze during a session, and after I close it, it won't restart.
What I have found is that if you hit CTRL-ALT-DEL is that there are multiple copies of Netscape open for some reason, and if you shut down each one using the 'End Task' that it will start again when reopen it.
Not sure if this is the same issue as what you are going through, but I thought I'd throw it out there.
Good luck, Ed.

Ed,
Thanks for that info, but this is when I start up at the beginning of the day even after a normal shutdown the previous night. Then if I shutdown during a session and start up again later it will do it. Now this morning, I started the PC and the Microsoft theme music was "slow" so I did a restart, connected to the internet and had no problem getting Netscape to load.
I'll have to check it later, if I get a lockup, I'll try your info.
I did a scan disk & Defrag last night and the scan disk did find an error and fixed it.
I had already done a scan disk the previous day when this was happening and had no errors. I was having Invalid Page Fault problems last night for unk. reasons. That's why I did the SD & Defrag.
Thanks for the reply...take care,
Russ