Hello, I apologize for this problem! It seems that your antivirus software has locked PicturesToExe's file "PteViewer5.exe". Try to check this file manually with your antivirus: If you have 32-bit version of Windows: C:\Program Files\WnSoft PicturesToExe\8.0\Main\ If 64-bit: C:\Program Files (x86)\WnSoft PicturesToExe\8.0\Main\ My version of Microsoft Security Essentials doesn't find any problem with this file. And PicturesToExe 8.0.10 can create EXE shows and run preview. If you have other antivirus or security software, please disable them temporarily. P.S. Try also install PicturesToExe 8.0.10 into a new folder. For example: C:\Program Files\WnSoft PicturesToExe\8.0temp\