If the program will not load successfully when you enter the correct serial number then there may be problem with Windows WinTrust on the system. The Dragon installer uses Windows WinTrust to verify that the cabinet file's digital signature is valid. In some cases there may be a problem with WinTrust detecting the file's valid digital signature.
The most likely explanation for the extra words like "all" is that your microphone is positioned badly. If the mic sits in front of your mouth rather than to the side, your words are being punctuated by little bursts of air. Those puffs hit the microphone and make a short, sharp noise that Dragon Professional Individual interprets as a short word. It’s also possible that the breath coming out of your nostrils is blowing across the microphone. In either case, move the mic farther to the side of your mouth.
When the beep feature is enabled, every time the program recognizes any given word, phrase or command, it initiates a beep that helps users know that the application has recognized the speech and is now ready to transcribe it. Go to Tools Options - View, then under the Results Box section, uncheck the Beep after recognition option.
Please let me know if you have any further questions on this topic and I'll be more than happy to help? :)
Have a good day and stay safe,