This page lists the last versions of certain Windows applications that do not require a processor with support for SSE2. Examples of such processors are the AMD Athlon XP and Intel Pentium III.
Such applications usually crash suddenly and reproducibly on startup or when you attempt to use functionality that requires SSE2 (Blender and VLC are examples of those). A definitive sign is the following error message:
The application failed to initialize properly (0xc000001d). Click on OK to terminate the application.
Perhaps the biggest reason why later versions of these applications require SSE2 is because Visual Studio 2012 and later automatically compile code for SSE2 processors, so many developers are not even aware of it.
It is assumed that you are using Windows XP. (The last version of Windows to not require SSE2 is Windows 7, but Windows XP is probably a better choice for such computers.)
Note: just because an application doesn't require SSE2 doesn't mean that it doesn't require MMX or SSE. Therefore it may still not work on even older processors.
Please check back later as this page is continuously being updated. In the case of open source applications, unofficial versions sometimes appear to restore support for old systems. Contact me if you are looking for an application that is not on this list or want to add some.
|Contig||1.7 (The latest, 1.8, still supports Windows XP with SSE2.)|
|EMET||4.1 update 1 (This is the last version for Windows XP, regardless of SSE2.)|
|Git||2.10.0 (Just say no. Use Mercurial or something else if you can. This is the last version for Windows XP, regardless of SSE2.)|
|Process Monitor||3.1 (Last for Windows XP with SSE2 is 3.2.)|
|Processing||(The latest version works despite officially requiring Windows 7 or later.)|
|Python 3.x||3.4.3 (The latest in the Python 2.x series, 2.7.14, does not require SSE2.)|
|QEMU||2.7.0 (This is the last version for Windows XP, regardless of SSE2.)|
|SDelete||1.61 (This is the last version for Windows XP, regardless of SSE2.)|
|Spotify||0.9.11.27? (It installs but I don't know whether it still actually works.)|
|VLC||2.0.8? (Note: it has problems related to playback of M4A files which do not appear to be caused by SSE2; 2.1.0 fixes that but already required SSE2 to play e.g. MP4 video)|
There is no single best choice; which browser to use depends on your needs and which sites you visit.
I started compiling New Moon (an unofficial version of Pale Moon for Windows XP) without SSE2 in November 2017. It is the newest browser without SSE2 and for Windows XP.
Before that, the last version ("Pale Moon SSE") was 26.5.0 from October 2016.
You can get both from my Pale Moon/New Moon for Windows XP page.
The last official version of SeaMonkey that does not require SSE2 is 2.40 from March 2016.
There exists an unofficial version 2.48 without SSE2 from May 2017 (more information). To install it, open the installer with e.g. WinRAR and extract the "core" folder from there, or download my zip archive and extract that.
The last extended support release of Firefox without SSE2 is 45.9.0ESR from April 2017. It is newer than version 49, which was the first regular release that required SSE2.
Firefox is the slowest of all browsers on this page.