You can check the official website of Virtual DJ (now known as Pioneer DJ) to see if they provide archived versions of their software. They might have a "Legacy" or "Archive" section where you can find older versions.
Before I provide any information, I want to remind you that downloading software from unofficial sources can pose security risks to your computer and may violate copyright laws. Virtual DJ 7 is an older version, and its compatibility with modern operating systems and hardware might be limited.
That being said, I can offer some guidance:
You're looking for a free download of Virtual DJ 7, an older version, specifically the 64-bit version.
Would you like more information on Virtual DJ or alternative DJ software?