What is PMB.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the PMB.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for PMB.exe related errors

PMB.exe file information

Windows Task Manager with PMB
PMB.exe process in Windows Task Manager

The process known as Pando Media Booster belongs to software Pando Media Booster by Pando Networks (

Description: PMB.exe is not essential for Windows and will often cause problems. PMB.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 3,077,528 bytes (23% of all occurrences), 3,093,624 bytes and 31 more variants. 
The file is digitally signed. The file is not a Windows core file. The program has no visible window. The process starts upon Windows startup (see Registry key: Run). PMB.exe is able to monitor applications. Therefore the technical security rating is 51% dangerous, however you should also read the user reviews.

Uninstalling this variant: In the event of any problems with PMB.exe, you can also do the following:
  • ask Customer Support [1][2] to assist you
  • uninstall Pando Media Booster or Pando software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7)

Recommended: Identify PMB.exe related errors

Important: Some malware camouflages itself as PMB.exe. Therefore, you should check the PMB.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

I know that this file is used to bosst download speed for some games so if your playing an MMO the its ok if u have never heard of an MMO delete it
The Pando Media Booster is a tiny (2MB) UI-less client that enables you to cost effectively stream full-screen HD video by leveraging your viewer's collective spare bandwidth. Running as a secure transparent background service on your viewer's computer, the Media Booster optimizes video streams by intelligently streaming your videos from multiple sources; your CDN servers as well as the computer's of other viewers ("Peer Cloud"). - Comment from
  Unkown   (further information)
Pando Media Booster, supposed to be a P2P data spreading thing, slows down your connection, costs you lots of traffic, and possibly spys on your system
PMB is used by mmo games such as Dungeons and dragons online, so if you have a game like this, then it's fine to have this process running.
Pando Media Booster. Wird für gewöhnlich in Peer to Peer Clients verwendet, wie z.b. den Downloader von Lord of the Rings Online. Service beendet sich für gewöhnlich nach Abschluss den Downloads nicht und sendet fleissig weiter Daten.
  Neko   (further information)
if your computer is always uploading this is the culprit. Some companies use it to download their games, but it is a pier-to-pier program that will frequently hijack your connection by saturating your upload bandwidth. In the Control Panel, you can find it and disable it or limit the upload bandwidth, or you can uninstall completely though you may need it again for future game downloads.
es gehört zu online Rollenspielen, genau genommen kams bei mir mit war of angels(gamigo).
This popped up and is the only process allocating bandwidth for Leauge of Legends (installation).
PMB = Pando Media Booster. It's installed along with some of the MMORPF games. This application is suposed to store youre account information and send it to the server for authentification...and as far as i can see...if you uninstall it, there are games then might possibly stop working...some like CrossFire, 4Story, Metin2, etc...
mit dem PMB wird zum beispiel lotro geladen. das programm schont die bandbreite des eigentlichen downloadservers, indem dateipakete von jedem rechner der die datei ebenfalls geladen hat zu senden. dies nennt man auch "peer to peer connection" ! das programm kann aber bedenkenlos gelöscht werden!! das einzige problem ist das es einen teil eurer I-net-leistung abzweigt!!!
PMB.exe is for Pando Media Boosted application. Sometimes gives error Pando Media Booster cannot connect to the network, see link to fix it.
  Maria   (further information)
I got that installing League of Legends. After uninstalling LoL I still had Pando on my disk. :-(
Pando Media Booster. Think it got installed with the Vindictus client. All it seems to do is upload heaps without my consent. Uninstall it.
Its used by some online MMO's client to run faster (example being League of Legends)
  Nicolai Daugaard  
Spyware! Dangerous, This software cannot be removed from your PC, monitors your processes, listen and communicates through HTTP protocols without your permission, reinstalls itself if you try to remove it, and will crash your system if you tamper with it. Its dangerous, and so far only way to remove it permanently is to format your harddrive. NO mmo NEEDS this, they market it as a DOWNLOAD BOOSTER, yet installs into Control Panel, runs invisibly, makes 100+ HTTP net connections to unknown sources even when PC is idle, and will ultimately Keylog your every activity.
my fire wall tells me every now and then that the exe file is trying to contact different ip addresses
PMB is Pando Media Booster. It helps speed up downloads of a whole lot of MMORPGs. It continues to run in the background to seed other people's downloads. It's not harmful at all and you can change the settings for it or uninstall if whenever you want.
  Aeval   (further information)
Wird von League of Ledgends installiert um Daten per P2P bereitzustellen.
i think its a virus but im not sure
A photo transver program.
  Jesse Jefferies  
I couldn't figure out how I was uploading so much the last few day. I finally checked resource manager and saw PMB.exe had a ton of connections. Uninstalled Pando Media Booster and voila, no more wasted bandwidth. Get rid of this program unless you want to waste your bandwidth.
Got it From Lol was annoying would not let ne end the prosses
Pando Media Booster does not cause trouble on your system MOST OF THE TIME. However, I have seen it use a good bit of my bandwidth, and it sometimes causes my computer to lag slightly. It is otherwise a fairly harmless program
joe7 is right. i got it from downloading Leage of Legends. Most likely harmless. i would uninstall though.
Note: pmb.exe may be disguised by spyware, malware, virus and Trojan, if you find you didn't install that software, it must be virus. The virus may slow down computer performance, system crashes, data loss and privacy leakiness
  Oliiver   (further information) (further information)
installs itself and starts uploading causing internet connection to slow down
It comes with League of Legends.
It increases your memory usage, until your computer freezes.
Its Pando media booster, If you go to Taskmanager 4th tab, click the button under the green lines, u get a new screen (I'm on dutch, I don't know how it's called) search for something like networks tab and if its spammed with PMB.exe you've got yourself a big trojan horse (I did). it leeches your computer and data from it and spreads it over all the world, sadly. To remove it, you should first deactivate it, normally its on and doesn't allows you to deactivate it, go to start type in: Msnconfig search pando media booster in the tab of programs that start when windows start uncheck reboot!
  14 year old dutch kid glad to help!  
PBM.exe gets installed when the Perfect World Entertainment Core Client is installed and you download a game there like Blacklight Retribution (Closed Beta) or other games of Perfect World
  Flandre   (further information)
It hogs my bandwidth :(
It was a mandatory to download Star Trek Online. after downloading and installing the game. i quit all progs but PMB kept running in the background with 6 outgoing connections, dont pin me on this but as far as ive learned you only need PMB to download stuff.
It doesn't enhance your gameplay. It essentially works like a torrent. It provides you with a game download and then uses your internet to provide other people with a game download. It is a safe program, but end it if it's running in the background and you're not downloading something. It can cause frequent lag spikes and disconnections.
  A gamer.  
it is always connecting to something. The modem lights in the tray are always indicating traffic flow. I got rid of it and everything works fine still and there is no traffic on the internet until I start an app.
  Bob Elsinger  
it creates a lot of connections on my computer. it's using my computer as a server without my permission
  slightly pissed  
Can hog excessive bandwidth. Programs like netlimiter can be used to limit bandwidth usage.
Most game companys prefer it to be used as a downloading speed boost program. Other places that give this away are trying to hijack your computer and upload any banking information, passwords, etc via a virus. I'd suggest deleting it off your hard drive right after you get the game it was attached to.
PMB.exe is used by League of Legends to allow other players to download the game using your Internet connexion. PMB.exe uses a little bandwidth, but it creates a huge number of HTTP connexion that might totally break your Internet when the connexion limit is reach (depending on your OS and on your Internet provider).
Pando media booster is exactly what it says. You get it when you download things like LoL or any Perfect world Ent. games. If you are using it to download games from them it is most likely harmless. Allowing others to download as well. But whne you are downloading other things and Avg/mal/ any other firewall/anti virus software catches it running in the back broung trying to up load, I recomend stopping the proccess. I just stopped it on my system and it stay gone until I rebooted. Im hunting it down now to find out if those games are playable after removal of this process.
My internet security software told me I had 275 active TCP connection, after uinstalling this software I now have 75. Uninstall this asap thats my recommendation.
Safe and completely harmless. Does not access any personal info.Will run when system has available resources to send and recieve whatever files you had requested to download. will continue to send pieces f said file to others aas needed. I would turn it off after your game is downloaded and only turn it on when needed. Go to control panel and open Pando media booster. from here uncheck the start at windows star up and also click the turn off button. now it is off. You can easily uninstal it if you wish IT does not come back again by itself only if you go and download another game or video etc.
  Todd   (further information)
Pando Media Booster is a safe program, independently verified and signed by VeriSign. All files and processes are publicly disclosed and clearly displayed to any user. It can always be shut down or fully removed. Pando Media Booster will never carry viruses, spam, or spyware and will not be used to track personal information, files or browsing habits.
  Mark   (further information)
League of legends I got it while installing a MMORPG . After that My internet became nearly unusable. I supose it takes all your internet connection to transfer league of legends to others computers. It unstall really easy with no side effects
  League of legends man  
This basically steals your bandwidth WITHOUT WARNING to stream Videos/Downloads etc. to other users of a game/service, so that shady publishers can save some bucks. Get rid of it ASAP.
  John Doe  
I got this thing from downloading league of legends, and it completely slowed my user to a halt when accessing the internet or any videos/graphics. I recommend getting rid of it immediately (as everyone else on here has already posted) it may be spyware.
  Alex B  
I seem to have the legitimate PMB.EXE installation (it's in a Pando Networks program file folder), but it did slow my computer down a lot, taking up a lot of computing power as seen in Task Manager "Processes" tab. Seemed to be installed along with D&D Online (MMORPG) last night. I ended the process with Task Manager and then shut it down permanently with MSConfig, and my computer is back to normal.
  Jargos Singozarin   (further information)
Spawns tons of tcp-connections, ping time 30'000% worse, good boost there...
Quote: Correct me if I'm wrong, but it's basically like a torrenting or P2P program for any affiliated games (in this case, LoL). That's why you usually get very high DL rates on most games running Pando (try any Nexon game) but it uploads (seeds) game info for other people downloading LoL using Pando, so long as Pando still remains on your PC. You can uninstall Pando with no harm done to your client.
  Guest   (further information)
Bei League of Ledgends automatisch mitinstalliert
This program can be really annoying when you are testing websites on localhost, because it uses the port 443 wich is the basic port for appache servers. I tried everything and it didn't work, I thought it's caused by the httpd.sys wich might use port number 80, wich is needed too to start the localhost server. Then I checked netstat more closely and I noticed that PMB.exe uses port number 443. The same with the googledrivesync.exe, wich uses port no. 3306 wich is needed for local mysql server and phpmyadmin. So I think it may come in handy for someone but I don't really need it. It's just annoying to stop that every time I want to test my php code.

Rating chart

Summary: Average user rating of PMB.exe: based on 81 votes with 50 user comments. 6 users think PMB.exe is essential for Windows or an installed application. 11 users think it's probably harmless. 31 users think it's neither essential nor dangerous. 19 users suspect danger. 14 users think PMB.exe is dangerous and recommend removing it. 3 users don't grade PMB.exe ("not sure about it").

Do you have additional information?
What do you know about PMB.exe:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving PMB issues

A clean and tidy computer is the key requirement for avoiding problems with PMB. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the PMB.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

PMB.exe [all]