Yes, you can but you have to be careful because hidden folders are usually required for the operating system. But you are sure that you can delete it safely, follow instructions. First, to delete a hidden folder you should have an administrator-type account, it's required. Second, hidden folders should be visible. To make them visible you have to choose in the explorer window: My Computer->Tools->Folder Options...-> tab "View". In the advanced settings list box choose Show hidden files and folders. Sometimes your account is not the folder/file owner the system will not allow you to delete it. In this case you have to take ownership of the folder/file and allow your account to have full access to the required files/folders.