stmain.dll is a dynamic link library component of the Microsoft's Messenger program (MSN) toolbar. It can be disabled but this may lead to problems if you are using the MSN Messenger service or software. 

If you want a detailed security rating about your stmain.dll (and all other running background processes) read the following user opinions, and download the free trial version of Security Task Manager.

Note: Any malware can be named anything - so you should check where the files of the running processes are located on your disk. If a "non-Microsoft" .exe file is located in the C:\Windows or C:\Windows\System32 folder, then there is a high risk for a virus, spyware, trojan or worm infection! Check it out!

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Users Opinions

4959 users ask for this file. 25 users rated it as not dangerous. 4 users rated it as not so dangerous. 19 users rated it as neutral. 11 users rated it as little bit dangerous. 14 users rated it as dangerous. 6 users didn't rate it ("don't know").

All comments about stmain.dll: related to MSN Toolbar   Its an file used with the MSN toolbar, and it is completely harmless   Marcel Part of MSN Toolbar   Guy Vils MSN Toolbar file... Harmless. (even if toolbar is annoying)   Shane MSN Toolbar DLL, minor problems may appear on deleting this file  See also: Link   Shu-Tyu Part of the MSN toolbar. As most toolbars not needed, I suggest removing the BHO with HijackThis   Eddy It doesn't let you to open internet explorer   LanGame came in with MSN Messenger v7.0   William I some how it stops Pogo games from downloading   angelwings50.1 This .dll file was corrupted on a IT lab computer here on my campus. It was causing problems with IE opening. I simply cut+paste the .dlls to one folder up, and it allowed me to run IE finally.   Donny Rhea MSN toolbar dll. Just uninstall the toolbar.   Hannibal part of msn toolbar   seba it crashes IE   Not Dangerous   Ari Not Sure Still checking the file out, however my IE started to experience problems openning web pages. So far this file seems to be one of the only other sources that might cause this   Frank came in with MSN Messenger v 7.0   ronnie d Completely harmless   Lore The Task manager shows high resposibilty to the CPU and evaluation - but i dont think this is a threat.   Kris When this is running IE 6 crashes with an internal Buffer overrun error. Removing with BHO everything functions normally(?)   ChefJohn Closes IExplorer windows seemingly at random.   Sirocco This is the file that you will see in programs such as HJT that loads the MSN toolbar. If you want to keep your toolbar installed you'll have to leave this file alone.   Roy Crashes IE when attempting to update McAfee services   something like MSN or related to it   etirini18 Appears to be part of MSN Messenger v.7.0 Doesn't show up on adaware /spyware/Virus Scans.   ickis9 It prevents me from accessing only certain web pages (ie: some shopping pages, game pages) - no real IE issues though...just annoying.   Em not dangerous at all, part of msn toolbar, just uninstall it in add/remove programs if u want   Tecneac came in with MSN Messenger v7.0. it is absolutely a spyware. and very dangerous.   yasar causes crashes in IE and also after running Spysweeper to remove other spyware.   GWtech Why run another service when msnmsgr.exe is already running. It's got to be looking or doing something   fun1chicago it will reopen itself after closing the process ANNOYING   John no problems, but I use firefox no IE   Alan I now understand that it's a msn toolbar nag. But still it's a menace when checking mail or browsing the net when it crashes IE. Delete it and join yahoo   passinthru unneeded, usually safe   bunny Sometime closing a browser (IE) window running Flash file gives error: 'Stmain.dll' caused an error and then an 'Add-On' dialog box appears to Enable/Disable this.   Meengla Can be corrupted by downloading IE7 Beta 2. Will prevent startup IE, even after rollback. Disable though advanced tab.   Ronald Schutte Scorch is a plugin for viewing Sibelius music scores in html formal. I presume that doesn't pose any risks.  See also: Link   Dan It will cause problems with IE 7, not allowing you to open IE. Simply uninstall the MSN toolbar until a new version of the toolbar comes out!   Cheesy Bread You can find this text from the file "Building and sending daily status report..". i think its spyware because of text about sending reports like "Starting new capture session"   JFK Makes IE krash...   peter Giger stopped IE7 and other programs from working, I deleted it, all is well   ollie crashes explore 7 (beta). When disabled, no problem!   cuhullainn this file came with my beta 2 version of IE 7.0, if you get this error with IE7 then just disable it   matt Malware on XoftspySE.   Richard Straley. It causes ie 7 beta to not load. Running xp pro.   Ed Crash IE (7 beta), Remove it for good using of IE   Nelo First spotted when using IExplorer 7 for the first time. Won't allow the programme to open. Can't revert to IE6. Thankfully have Firefox.   smiler-35 Uninstall MSN toobar   Ryan causes crahes ie while attemting to run java applications   ertac uses high resource and show to be IE browser extension as well as a vebatum activity logger  See also: Link   ARClark-Steiner on my system just closes some web but, when you need that web you take care about it  See also: Link   Douglas Camacho First of all its related to MSN tool bar and second it is certified by Microsoft which is trustable corporation ..of course it is bound by all the reuqired laws for internet and customer saftey   Vishal Patel como recuperar stmain dll   melche Explorer Extension for Microsoft Messenger (Microsoft Network)   Asier Larrabide it keeps popping up when i open my yahoo mail   michael sweeney If you know more about stmain.dll, share your knowledge and help other users. Security Rating:  --- don't know ---  1 (not dangerous)  2  3 (neutral)  4  5 (dangerous) What do you know about this file: Link for more details: Your Name:

More process information

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