When testing my installation (still using IS 5) with Windows 8 it complains about the setup file being a 16bit program.
You can choose whether you'd like to disalbe 16bit programs or not.
After choosing "disable", there is no chance of running the setup again.
OK, I did not find out, where this can be reset, but this should not be done by the user.
Is there any possibility to run setup as a 32bit program from the start?
I tried to run _INST32I.EX_ directly instead of setup.exe.
I tried rundll32 _setup.dll.
But that did not work

Anybody got an other solution than changing to a recent install tool ???
I have to stick to IS 5 until the end of this software

best regards
Thomas