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Articolo della base di conoscenza 17

The NTVDM CPU has encountered an illegal instruction.

This error message may appear when running a downloaded installation file.

Two possibilities:

The download file is simply corrupt. The only solution is to delete it and re-download.
An icompatibility with a UK School Software utility called SIMS. The incompatibility is between the Installshield EXE builder and SIMS. In order to run SIMS on XP machines in a network environment, SIMS issue a patch which enables their DOS based modules to run correctly and not run out of variable space. This patch causes the problem - remove the patch temporarily and then install Ability. This applies to any software installation built with Installshield 3.0 and EXE builder.