First, install the latest version of .Net Framework, reboot your PC and delete the files from Temp folder (C: > Users > Computer > AppData > Local > Temp). Also, since this error is in general caused by some .dll files that are missing or corrupted, I suggest you run Dll-Files Fixer. It is an utility that can solve all major .dll related issues. If the problem persists, uninstall and reinstall MyTax Professional.
