HOMM4 Install problem

[fodderboy]

I am having problems installing my backup copy of HOMM4, everything appears to be working untill the installer shield gets to 99% then it stops with the following error:

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_INS5576 caused an invalid page fault in
module _INS5576._MP at 0167:0042675f.
Registers:
EAX=6b880000 CS=0167 EIP=0042675f EFLGS=00010206
EBX=005b0000 SS=016f ESP=006bd6e4 EBP=006bd6f4
ECX=004e6bc6 DS=016f ESI=00000000 FS=131f
EDX=004e6ce2 ES=016f EDI=00000000 GS=3df6
Bytes at CS:EIP:
8b 40 04 89 45 fc 8b 45 fc 8b 00 03 45 f8 8b 4d
Stack dump:
6b880000 00000006 004e6b88 004e6b88 006bd708 004263dc 004e6b88 004e6bc6 004e6b88 006bd720 0042595f 004e6b88 0000000c 00000600 00000200 006bf920
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Any ideas?? I have update all drivers, I am using DirectX 8.1?