When talking about OS reinstallation, generally we would think of using CD/DVD or USB flash drive. But if our computer does not equip with a built-in CD/DVD-ROM (because they are already outmoded), and we have no pendrive (a bit difficult to make and use) or mobile HDD in hand, what then?

For system administrators or advanced computer users, most often, we need to quickly and efficiently deploy/install the same one or a set of software (especially all kinds of necessary system components, such as: Visual C++ Redistributable Packages, DirectX End-User Runtimes, Microsoft .NET Framework, Microsoft XNA Framework Redistributable...) on many computers. This kind of need can be met by a technique called software installation automation (AKA: unattended install or silent install).

Assume confronted the following situations: you want to reinstall Windows OS, but your CD/DVD-ROM is broken; or there is not a CD/DVD-ROM in your PC at all; or maybe you even don't have a Windows setup disk. So how to install Windows now? Can't you finish that without so many restrictions?

WICleanup is an application used for scanning and clearing away the unused, unwanted Windows Installer redundancy (junk) files inside system (MSI and MSP files in the "\Windows\Installer" folder), with full name "Windows Installer UnUsed Files Cleanup Tool".