Need advice on zipped files, please...

Hello,

Would someone advise me on where the zipped files are stored when you open one without really unzipping it to anywhere?

What I mean is in Windows Explorer, when you click on a zip file, say a zipped video file for example, it opens up another window to show you the content and lets you access to the file directly without having to unzip it to somewhere first. Thus, I suspect this file must be stored temporarily somewhere in the C: drive (not in the temp folder, I checked). I realise that my drive space in C: gets lesser with each zip I access directly. Where can I delete these files, if what I'm saying is true? I'm running out of drive space. I only store windows files in C:, any other files are all stored in other drives so there's no waythe C: space keeps shrinking without any files added to it.

Please advise on how I can resolve this? Disk Cleanup is not helping much.

Thanks.
Eleven.