Sorry, do not know answers, but maybe more data about the problem will help you get solutions.

First I run also Win98 SE
I do not run zonealarm
Celeron 566, 192 MB, Kabelmodem

Several times got teh Execption EInvalidPointer in module xolox.exe at 000027FC Invalid Pointer operation.

after minimalize xolox window and then exit xolox icon.

Only thing possible, restart computer.

Hope there will come a bug fix.