Select the Always use the selected program to open this kind of file check box. Press OK. Note This does not change the default PDF viewer in Internet Explorer. Alternatively use these steps using Control Panel AddRemove Programs to change the Windows Explorer Integration, Internet Explorer Integration, and Enable Viewing of PDF Files in Internet Explorer settings. Click Start Settings Control Panel AddRemove Programs. Choose Scan. Soft PDF Converter Professional. Click Change. Choose Repair. Click Next 3 times. In the Windows Explorer Integration section clear the check mark from Default viewer for PDF files. Click Next. In the Internet Explorer Integration section, clear the check mark from Default viewer for PDF files. How To Set Adobe Reader As Default ProgramsClick Next.