Windows 95是美国微软公司于1995年推出的电脑操作系统。

Windows 95是一个混合的16位/32位Windows系统，其版本号为4.0，开发代号为Chicago。1995年8月24日发行。Windows 95是微软之前独立的操作系统MS-DOS和Microsoft Windows的直接后续版本。第一次抛弃了对前一代16位x86的支持，因此它要求英特尔的80386处理器或者在保护模式下运行于一个兼容的速度更快的处理器。它以对图形用户接口的重要的改进和底层工作（underlying workings）为特征。同时也是第一个特别捆绑了一个版本的DOS的视窗版本（MS-DOS 7.0）。这样，微软就可以保持由Windows 3.x创建起来的GUI市场的统治地位，同时使得没有非微软的产品可以提供对系统的底层操作服务。也就是说，Windows 95具有双重的角色。它带来了更强大的、更稳定、更实用的桌面图形用户界面，同时也结束了桌面操作系统间的竞争。

Windows 95 (codenamed Chicago) is a consumer-oriented operating system developed by Microsoft. It was released on August 24, 1995, and was a significant improvement over the company's previous DOS-based Windows products.

Windows 95 merged Microsoft's formerly separate MS-DOS and Windows products. It featured significant improvements over its predecessor, Windows 3.1, most notably in the graphical user interface (GUI) and in its simplified "plug-n-play" features. There were also major changes made to the core components of the operating system, such as moving from a mainly co-operatively multitasked 16-bit architecture to a pre-emptively multitasked 32-bit architecture.