{"id":199890,"date":"2026-01-25T20:23:05","date_gmt":"2026-01-25T20:23:05","guid":{"rendered":"https:\/\/teknomers.com\/en\/windows-95-had-a-hidden-secret-that-made-rebooting-faster-the-chaos-behind-its-architecture\/"},"modified":"2026-01-25T20:23:06","modified_gmt":"2026-01-25T20:23:06","slug":"windows-95-had-a-hidden-secret-that-made-rebooting-faster-the-chaos-behind-its-architecture","status":"publish","type":"post","link":"https:\/\/teknomers.com\/en\/windows-95-had-a-hidden-secret-that-made-rebooting-faster-the-chaos-behind-its-architecture\/","title":{"rendered":"Windows 95 Had a Hidden Secret That Made Rebooting Faster: The Chaos Behind Its Architecture"},"content":{"rendered":"\n
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Before Windows 95<\/strong>, using other operating systems often felt like stepping into an entirely new world. Windows 95 introduced groundbreaking features such as the Start menu, taskbar, and Plug and Play functionality that have since become standard. Yet, lurking beneath this user-friendly interface was a complex architecture characterized by the coexistence of DOS, 16-bit Windows, and early 32-bit elements. This architectural complexity not only transformed user experiences but also led to behaviors that continue to intrigue tech enthusiasts today.<\/p>\n

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One little-known secret of Windows 95 was its alternative method for rebooting the system. By simply holding down the Shift key while initiating a reboot from the graphical interface, users prompted a message stating, “Windows is restarting,” rather than executing a full cold restart. This technique, detailed by Raymond Chen, offered a not-so-subtle advantage in a time when minimizing downtime was crucial. It activated a streamlined internal mechanism aimed at preventing a full system reboot whenever feasible.<\/p>\n

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The Shortcut That Did Not Restart Completely<\/strong><\/h2>\n

This behavior stemmed from a specific technical decision. According to Chen, Windows 95 utilized a flag named EW_RESTARTWINDOWS in conjunction with the older ExitWindows function, which was still 16-bit. Rather than commanding a full reboot, this flag instructed the system to close and then restart Windows<\/strong>. The objective was to economize on time and resources, as long as the internal state allowed it to do so.<\/p>\n

Upon selecting this alternative route, the process followed a carefully crafted sequence. Initially, the 16-bit Windows kernel would shut down, followed by the deactivation of the 32-bit virtual memory manager. The system would then enter real mode\u2014the most fundamental state. Control would subsequently revert to win.com, which received a signal indicating that Windows should restart in protected mode, bypassing the need for a full boot.<\/p>\n

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From this point, the most delicate phase of the process commenced. The system had to mimic a clean boot of Windows, which required resetting command line options and returning global variables to their original states. This task, although largely clerical, was notably complex due to win.com being written in assembly language, devoid of modern programming conveniences.<\/p>\n

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A crucial factor in this process was memory management. When win.com was executed, it was allocated all available conventional memory but freed almost all memory beyond its own code. This allowed for a large contiguous block to load when entering protected mode. However, if a program occupied some of that free memory during a session, fragmentation could occur. In such cases, win.com could no longer replicate the original memory map it expected, resulting in the abandonment of the fast reset in favor of a hard reset.<\/p>\n

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\"Windows95\"\n <\/div>\n<\/div>\n

If the memory situation was favorable, the process would smoothly transition without reverting. Win.com would jump to the protected mode boot code, reactivating the virtual machine manager and reestablishing the 32-bit layers. Following this, the graphical interface would load as usual, bringing users back to their desktop. The key difference was that the entire system hadn’t undergone a reboot, optimizing the experience.<\/p>\n

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This type of quick reboot was a product of the intricate architecture inherent in Windows 95. The operating system had to operate smoothly with DOS, 16-bit Windows applications, and Win32 programs, which necessitated practical, if not always elegant, solutions. Developers capitalized on this complexity to introduce hidden optimizations that could speed up restarts, though at times they resulted in system crashes.<\/p>\n

A continual drive to conserve memory led to innovative coding strategies. For example, it was commonplace to recycle sections of code no longer in use as if they were free memory. In win.com, the initial bytes of the entry point were cleverly repurposed as a global variable, based on the assumption that this code would only run once\u2014making it viable during quick restarts.<\/p>\n

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\n \"People\n <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

However, these shortcuts weren’t without issues. Some users experienced errors after multiple quick reboots, likely due to drivers failing to restart properly, which left the system in an unstable state. This quirky behavior, not highlighted in any documentation, encapsulated the spirit of Windows 95: inventive, ambitious, and filled with compromises.<\/p>\n

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Images | Microsoft<\/p>\n

In Xataka | Schr\u00f6dinger’s Office: at this point it is impossible to know if Microsoft keeps it alive or if everything is AI and Copilot<\/p>\n<\/div>\n


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General News – 2<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Before Windows 95, using other operating systems often felt like stepping into an entirely new world. Windows 95 introduced groundbreaking features such as the Start menu, taskbar, and Plug and Play functionality that have since become standard. Yet, lurking beneath this user-friendly interface was a complex architecture characterized by the coexistence of DOS, 16-bit Windows, […]<\/p>\n","protected":false},"author":1,"featured_media":199891,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36399],"tags":[21273,738,3668,5135,48254,1448,15113],"class_list":["post-199890","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-architecture","tag-chaos","tag-faster","tag-hidden","tag-rebooting","tag-secret","tag-windows"],"_links":{"self":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/199890","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/comments?post=199890"}],"version-history":[{"count":1,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/199890\/revisions"}],"predecessor-version":[{"id":199892,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/199890\/revisions\/199892"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/media\/199891"}],"wp:attachment":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/media?parent=199890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/categories?post=199890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/tags?post=199890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}