a number of win8.1 users are reflected in the installation of STEP7 Micro/win V4.0 SP9, every time the computer on the boot will appear assertion prompt window, prompting the Pniopcac.exe application error. So what should we do with this kind of problem?
The method is as follows:
1, press Win+r key, open run, enter services.msc, click OK;
2, in the service window interface, on the right to find and double-click to open the "SIMATIC IEPG help Service" and "S7traceservicex" services;
3, change the Startup type to "manual" or "Prohibit", click OK;
4, the setup completes, restarts the computer to be able.