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Also known as the Windows 1.0 BYTE demo. The earliest known version of Windows ever. -
This is a very early pre-release version of Windows, shown on the Fall COMDEX 1983 press material. It is extremely similar to the Personal Computer News 1983-12-01 build. -
A very early pre-release of Windows, likely compiled on the same date that is listed in the banner at the top of the screen. -
A very early pre-release version of Windows used during the official Microsoft Windows announcement on the same date. -
High-quality photographs of a build in a French magazine called L'Ordinateur Individuel were included in their February 1984 issue, and made another appearance in a Japanese computer magazine titled 月刊アスキー. There has been heavy debate on whether this is a different version or not because of how high-quality the photos are compared to the other confirmed versions that are virtually the same version visually. -
A very early pre-release version of Windows meant for InfoWorld's November 21st, 1983 issue. -
Not to be confused with the press material, this version is the operating system that was showcased at the COMDEX 1983 convention. -
This build is actually fake and a replica made from footage of early beta Windows 1.0 builds. Many people claim it is a real build, but it isn't.
For documentation purposes, the program was made in 2006 but will be listed as being made in December 1983. -
This is a very early pre-release version of Windows that originated from Issue 39 of Personal Computer News, dated December 1st, 1983. -
Featured in the Japanese computer magazine 月刊アスキー. -
This is the first of 5 developer releases that were distributed to application developers throughout 1984. This build is also likely the same as the earlier Tandy 2000 build. -
This is the second of 5 developer releases given to application developers over the course of 1984. This one was stated to be released around the end of May, but given the text at the top of the build reading "June 1984", it was believed to be released then. -
One of 3 Windows versions showcased on the Tandy 2000. Most likely the same version as the Development Release 1.
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Showcased at a Boston Computer Society meeting on June 26th, 1984. Most likely the same version as the Development Release 2.
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The third of 5 developer releases that were released over the course of 1984. -
The fourth of 5 development releases released through 1984. -
This is the fifth and final developer release, released over the course of 1984. -
This build was shown in a Tandy 2000 ad. It was also shown in a November issue of InfoWorld. This build is either Development Release 3 or related to it. -
A pre-release build of Windows 1.0. -
This build was featured in several issues of the Science et Vie Micro magazine over the course of 1985. -
A pre-release build of Windows 1.0. -
A pre-release build of Windows 1.0. -
A very early pre-release version of Windows 1.0, previously unknown but sold on a marketplace site called Mercari in 2021. Little to no information is known about this version. -
Shown in the July 1st, 1985 issue of InfoWorld. It closely resembles the Beta release but there are many different changes. -
A pre-release version of Windows 1.0. -
A pre-release build of Windows 1.0 that was featured in an August 20th, 1985 issue of PC Mag. -
These versions were sold on the Japanese marketplace Mercari. It is unknown how many versions actually exist so they are put into one entry. -
A pre-release version of Windows 1.0. -
The earliest known build to be released publicly. -
A string with the copyright information for this version and the boot screen can be found inside the Windows Device Driver Library Vol. 1. -
Another build that is lost and sold on Mercari. -
A build where 3 out of 4 disks were overwritten. The disks were later sold on eBay. -
This is a pre-release version of Windows 1.0. Only one of the five disks to this version has been released, which is disk five. -
No, not Windows 1.0. This is a fake version of Windows 1.01, believed by many to be real and the original official release of Windows. Basically a Mandela Effect. -
A version of Windows 1.01 made for the Zenith Z-100 computer line.
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The first retail release of Windows 1.0 -
A pre-release version of Windows 1.0. A copy of this version in German was found on a computer, making this the earliest known version of Windows ever in a non-English language. -
An "update" of sorts to the Windows 1.xx operating system, coming with 2 extra disks. This is the only legitimate release that is known as "Windows 1.00". -
A minor update to Windows 1.01. It was released only in Europe. -
This version was thought to be fake, but the logo files were found in a debug version of Windows 1.03. -
A minor update to Windows 1.01 and Windows 1.02. Also the main retail release in the US. -
This version of Windows 1.03 was made for the Japanese NEC PC-9800 series computer. -
A version of Windows 1.03 released for the HP-150 touchscreen computer. -
An unofficial port of Windows 1.03 for the Rainbow 100 computer. -
A version of Windows 1.03 for the Apricot XEN computer. -
A minor update to Windows 1.01, Windows 1.02 and Windows 1.03.