Steam Fatal Error Failed to load steamui.dll

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76561197967527250 19 Jan, 2015 @ 7:48pm

Steam Fatal Error Failed to load steamui.dll

All right. Valve made the same SSE2 mistake again.
This is the 3rd since 2014 summer.
( 2nd mistake was Oct 2014: http://gtm.steamproxy.vip/discussions/forum/1/540742579450260796/ )

A few hours ago, steam client was updated. then it does not start.
error message is

" Steam Fatal Error Failed to load steamui.dll "

Screen shot here ===> {LINK REMOVED}

I tested with my other PC(SSE2 support CPU), just works fine.
I believe this error happens to eveyone with these CPUs (SSE2 not support)
- AMD Athlon XP/Sempron
- Intel Pentium 3

I tried with previous steam.exe & steamui.dll combination, but the same error result.
(turns out, we need more old files than just 2 files)
new steam.exe V2.58.33.56 1,942,720 bytes 19/01/2015 --- error
old steam.exe v2.50.25.37 1,940,160 bytes 18/11/2014
new steamui.dll v2.58.33.56 11,252,928 bytes 19/01/2015 ---- error
old steamui.dll v2.50.25.37 16,649,920 bytes 18/11/2014

VALVE!!
Please always test your client update with old CPUs, then release.
and Fix!!!

<< WORK AROUND until Valve fix the problem>>
To go to the previous working steam client,

1. you need old files (from not yet updated PC) to overwrite new updated files;
C:\Program Files\Steam\*.* (every files except many subfolders) 74MB 56 files
(also no need 2 user files = AppUpdateStats.blob, ClientRegistry.blob )
C:\Program Files\Steam\bin (every files inside bin folder) 60MB 101 files

2. create steam.cfg file with Notepad.exe, only 1 line (this file prevent client-update)
BootStrapperInhibitAll=Enable
and save into C:\Program Files\Steam\

Now steam client works!

Last edited by Max; 20 Jan, 2015 @ 10:58am

< >

Showing 1-15 of 33 comments

76561197967527250 19 Jan, 2015 @ 9:39pm

I added into the original post.

<< WORK AROUND until Valve fix the problem>>
To go to the previous working steam client,

1. you need old files (from not yet updated PC) to overwrite new updated files;
C:\Program Files\Steam\*.* (every files except many subfolders) 74MB 56 files
(also no need 2 user files = AppUpdateStats.blob, ClientRegistry.blob )
C:\Program Files\Steam\bin (every files inside bin folder) 60MB 101 files

2. create steam.cfg file with Notepad.exe, only 1 line (this file prevent client-update)
BootStrapperInhibitAll=Enable
and save into C:\Program Files\Steam\

Now steam client works!

Last edited by Max; 19 Jan, 2015 @ 9:41pm

76561198173901417 19 Jan, 2015 @ 9:39pm

me 2

Márk 👑 20 Jan, 2015 @ 4:52am

The same problem... :/ VALVE please fix it! :/

Darky- 20 Jan, 2015 @ 8:42am

doesn'' work for me..

76561197967527250 20 Jan, 2015 @ 9:04am

Originally posted by Darky:
doesn'' work for me..

1. What CPU are you using?
2. Once you overwrite files, you should not have any January-2015 dated files (.exe .dll) in "steam" folder and in "bin" folder except winh264.dll (jan 5 2015)

nesk 20 Jan, 2015 @ 10:15am

same here from yesterday... athlon XP-M

jason1wolf 20 Jan, 2015 @ 10:21am

i had the same . i had peer block it was stopping steam connection

Darky- 20 Jan, 2015 @ 12:07pm

Originally posted by Rambo:
Originally posted by Darky:
doesn'' work for me..
1. What CPU are you using?
2. Once you overwrite files, you should not have any January-2015 dated files (.exe .dll) in "steam" folder and in "bin" folder except winh264.dll (jan 5 2015)

AMD sp3.