: Because it is considered "abandonware" by some, versions like this are often hosted on the Internet Archive
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Searching for "Sony Vegas Pro 100a build 387" often leads to confusion because the version numbers for this software can be tricky. While the request mentions "100a," it is likely a typo or a mislabeled file for either Sony Vegas Pro 10 VEGAS Pro 17 (Build 387) Clarifying the Versions Sony Vegas Pro 10.0a sony vegas pro 100a build 387 portable pre activated link
If a paid license is not viable, several industry-standard video editors are completely free and legal to use: : Because it is considered "abandonware" by some,
To run Sony Vegas Pro 100a Build 387 Portable Pre-Activated, users will need a computer with the following specifications: sony vegas pro 100a build 387 portable pre activated link