Microsoft claims that compressing and uncompressing (zip and unzip) a folder or files can be done “out of the box†with Windows Vista. You don’t need to purchase software to zip or unzip anymore! Recently I have purchased new laptop with MS Windows Vista Business pre-loaded. The experience with zip/unzip feature is very bad. For majority of downloaded zip files the extract doesn’t work with message like ‘invalid’ or “cannot open this archiveâ€! I assume that there is a configuration issue with pre-loaded MS Windows Vista Business as many others downloading the same file have not experienced any problem. The zip file is apparently valid but I am not able to extract it! Microsoft on the other hand does not provide technical support for preloaded software! I appreciate any assistance you may have. Many thanks.