Bob, back once more:
Ran all the MEMTEST86 tests (took about an hour plus) with 0 errors!
Since the last blue screen had probably damaged some browser info on exit Mozilla had lost its bookmarks. So I spent the rest of today to re-install Mozilla and get the bookmarks from Opera over - it insisted that it would only come up with IE favourites (which are pretty old on my PC). I even tried to install also Netscape but that did not improve the situation.
I got another blue screen after one of the downloads when leaving the browser, no checkdisk however afterwards.
I have been through the CNET fora/forums to solve the bookmark problem which is a nuisance since the Mozilla help seems to relate to an older issue; anyhow, I can live with that (manually rebuilding to Opera level.
I have uninstalled Netscape again not to complicate things for Mozilla !
Where I am stuck is the blue screen! From your main reply I have done nothing about drivers (not too sure where to start and how to continue).
Before that, is there any known bug in the W2K download manager? Can it be a bug created through the chkdsk action?
My computer is Athlon based, XP1700+, almost 3 years old, and worked well through the first two years or so. I cannot link the appearance of the present problem to any particular event in the last 6 months or so!!!
For today thank you, hope there is a way out (in the 3 years I've forgotten how to re-install W2K