Whatis MUI CACHE ?We'll search the Windows forum for an answer

The best way to describe the Windows Registry is: it's like a garbage truck that keeps collecting trash, but never goes to the dump!

I build and repair PCs and always install 2 free Registry cleaners on every PC. The ones I use are the free versions of: IObit Advanced System Care & Glary Utilities, as well as IObit Smart Defrag. After running these and rebooting, every PC boots, opens programs, and shuts down much faster.

MUI (I thought) stands for Multilingual User Interface but not sure how that relates to MUICache, but every registry cleaner I have used (and that's most all) will report "errors" or things that need attention from the MUICache and MRUCache (Most Recently Used).

That is just a section in the registry where Windows keeps track of things that have been happening on your system so it can remember things...

Read some about it here:

http://windowsir.blogspot.com/2005/12/mystery-of-muicachesolved.html

It is just an accumulation of what you have been doing on your system and you can disable it and clear/empty it but as soon as you perform any operation (click something), stuff is going to get put into the MUICache and MRUCache.  It doesn't hurt anything or slow you down.

If you look at this tool from NirSoft you can read about the MUIcache, view, edit, clean your MUICache withour using a registry cleaner:

http://www.nirsoft.net/utils/muicache_view.html

For an experiment, run that tool, look through the results and you will see what you have been doing on your system lately then you can select all the items and delete them all so the MUICache is empty:

Then do something simple like Ctrl-Alt-Del to bring up Task Manager and run the tool again (or refresh):

All that stuff for put into your MUICache just from opening Task Manager and everything you do on your system after that is going to put more stuff in the MUICache until it gets to a predetermined size.

So every registry cleaner is likely to report the contents of MUIcache as something that needs attention and you can sure have the cleaner empty the MUIcache for you but as soon as you perform any operation on your system it is going to start to fill up again.

Hi BobberBP

Thanks. You actually  addressed the question and gave a helpful answer. What a novel idea!!

Some of the MS MVP's should take their cues from you when answering instead of using it as an opportunity to be arrogant and more cryptic.

When I run a Registry Scan MUI CACHE shos up as a ERROY and needs to be deleted, what is MUI CACHE ?

Short answer:  Don't run a "registry scan."

If you ever think your Registry needs to be cleaned, repaired, boosted, tuned-up, cured, tweaked, fixed, or optimized (it doesn't), read http://aumha.net/viewtopic.php?t=28099 and draw your own conclusions.

Also see http://blogs.technet.com/markrussinovich/archive/2005/10/02/registry-junk-a-windows-fact-of-life.aspx

---

~Robear Dyer (PA Bear) ~ MS MVP (IE, Mail, Security, Windows & Update Services) since 2002 ~ Disclaimer: MS MVPs neither represent nor work for Microsoft

Longer answer:

Each time that you start using a new application, Windows operating system automatically extract the application name from the version resource of the exe file, and stores it for using it later, in Registry key known as the 'MuiCache'. 

For XP, this refers to the registry key HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\MUICache.

See:  http://www.nirsoft.net/utils/muicache_view.html

It could also refer to the Windows Multlingual User Interface cache, but AFAIK, that should only be in the registry for Vista or Windows 7.

BobberBP

Thank you!

This question keeps coming up and all we seem to get is don't run a registry cleaner. 

You answered the question and how to correct it.

I use IObit Advanced System care and find it to do the best job. 

I don't want to spend umpteen hours deleting registry keys for things like Nero (that's one of the worst)

Thanks Again

Bobberup