SB 3.5.1 reinstall = invalid page fault in kernel32.dll

Under Win98SE, I recently installed Firefox 2.0 in addition to, not as an overwrite of, my Firefox 1.5.07 installation. This type of additional install requires redirecting SB to the appropriate folder. In the past I have done this without problems. This time I decided to uninstall and reinstall SB, just in case the differences between FF versions was significant. Naturally, something went wrong.

I am now unable to run SB 3.5.1 at all -- it's generating this error:

SPYWAREBLASTER caused an invalid page fault in module KERNEL32.DLL at 017f:bff7b9a6.
Registers:
EAX=00000000 CS=017f EIP=bff7b9a6 EFLGS=00200246
EBX=00000000 SS=0187 ESP=009be210 EBP=009be224
ECX=00d6ea20 DS=0187 ESI=00d6ea88 FS=5717
EDX=0176f01c ES=0187 EDI=00d6ea88 GS=0000
Bytes at CS:EIP:
ff 76 04 e8 13 89 ff ff 5e c2 04 00 56 8b 74 24
Stack dump:
00d6ea20 70e2eb88 00d6ea88 00d6eae0 0176f094 009be248 70e2c50f 00d050fc 00001000 009be244 00000000 0176f094 00000000 00000000 009be264 70e26cbe

Various things have failed to solve this: uninstalling and re-reinstalling SB, including complete Registry cleansing; deletion of all SB database files, even rolling back to a 3-day-old Registry. The error persists.

I now believe that something went wrong during the "remove all protection" process prior to uninstalling SB, and that that is the source of the conflict. But I have no idea how to resolve it. Similar and/or identical error posts in the SB Forums mention only installation of the VB6 SP6 runtimes, which I have (versions verified).

Before I need to restore a previous C: image or reinstall Windows, ANY help on resolving this is greatly appreciated, I'm very hesitant to browse the web at all without SB by my side.

THX JLJ