Just to let everyone know, ducsetup.exe is a file used by numerous programs including NO-IP's IP update client. This file contains a trojan horse and is considered malicious software. Although they are still investigating just how it is being used, you may want to quarantine the files until more is known. The file usually used 2 paths which can be on numerous drives. The file does create a backup file by a different name that will also contain a trojan horse. There are 3 different versions of ducsetup.exe the most common being a file size of 668 KB. The backup file will be the same size file as ducsetup.exe

If you want to know more, just search the file name and you should find some websites that have information on it.