Microsoft veteran Raymond Chen recounted issues during the development of Windows 9x, particularly regarding software copyright violations among PC manufacturers. The Windows 95 team aimed to ensure compatibility with various PCs, discovering a BIOS string "Not Copyright Fabrikam Computer" while examining firmware. In the early 1990s, branded PCs often had preinstalled software that unlocked premium features based on specific BIOS strings. Some manufacturers, like the fictional "Contoso," manipulated these strings to bypass licensing fees, which was likely illegal. The developers faced challenges retrofitting Plug and Play technology onto older systems while navigating these deceptive practices.