If you have a *.zip file that contains vCard/VCF file with your contacts, you can simply extract it in Windows by right clicking on it and selecting the Extract option. Can also be done using any file manager with ZIP support.
Convert WinZIP Compressed ZIP archive to vCard contacts.
We found one software available in the database for this conversion.
Microsoft Windows software - convert zip to vcf on Windows
A series of operating systems produced by Microsoft
Convert from zip file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.