Windows XP comes built in with a compression tool that reads ZIP files as folders. When you install Windows, you can open ZIP files using that tool. Then, say you install WinZip or WinRAR, and then uninstall it. You’ll then need to reenable the inbuilt ZIP file reader. To enable Windows ZIP files as a folder feature again, you can use a simple command. At a command prompt,enter

“regsvr32 %windir%\ system32\zipfldr.dll”.

Press [Enter].