text: YES & NO\n\nDepends on how you want to Install & Uninstall the Operating System (OS)...\n\nTwo things need to be explained before answering such a question...\n- What is the OS;\n- How is it Installed/How dod you intend to Install...\n\nIf the OS is a Windows Upgrade, then Yes, you can Uninstall it and return to your Pewviously installed OS\n\nIf its a Fresh copy of any OS - and is the SOLO OS on the PC, then its not called Uninstall, but Format, to wipe out the Partition...\n\nIf you have TWO OS on one Partition with a Boot Manager, then, depending on the OS planning to move, you will Format the Partition of the OS that you intend to Remove (if its on a different Partition from the other OS)...also, you will have to remove it from the Boot Manager, so you don't get the boot selection screen everytime your PC starts...\n\nOn the other hand, if you are using VirtualPC or VMware, which simply enables you to install an OS as a Program under your default OS, then you simply delete teh Virtual Hard Disk you create, and that is basically it...\nInstalling on Virtual Machines is just like normal installations, but run as a Program on your OS...\n\nHope that answers your question...