What is a CAB file and why is it important for Windows installation?

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Grade: Education Subject: Support
What is a CAB file and why is it important for Windows installation?
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A CAB (Cabinet) file is a compressed archive format used by Windows to package and distribute files. During installation, Windows extracts the files from the CAB file to the appropriate locations on your hard drive. The data1.cab file is a specific CAB file containing essential installation components.