Hello Tb_959, this could be a compatibility issue between the software and the DVD you have installed on the laptop.
If you downloaded the latest IRST version from our website and it is the one causing the problem, you may want to try a customized version which should be provide by the manufacture of your computer.
You can also try using a previous RST version like the 12.5 for example. Just remember to back up all you data before making changes.