When running the Windows 2000 Readiness Analyzer, or WinNT32, from within W9x, you receive:

        WINNT32 this program has performed an illegal operation.                                      WINNT32 caused an invalid page fault in module KERNEL32.DLL at 0167:bff88396                                      Registers:                                      EAX=c00301a8 CS=0167 EIP=bff88396 EFLGS=00010202                                      EBX=02ca8808 SS=016f ESP=02c9fed0 EBP=02ca0048                                      ECX=00000003 DS=016f ESI=00000001 FS=21bf                                      EDX=bff76855 ES=016f EDI=02003cb0 GS=0000                                      Bytes at CS:EIP:                                      53 56 57 8b 75 10 8b 38 33 db 85 f6 75 2d 8d b5                                       Stack dump:
This error message is generally the results of having Quickbooks installed on your system.

To workaround this problem, rename Qbconv32.dll to Qbconv32.dl_, for each copy you discover.

After the upgrade, you can rename Qbconv32.dl_ to Qbconv32.dll, so Quickbooks will function.