AudioEndPointBuilder has too much Disk I/O Activity after Startup

Posted on 2007-08-10
Last Modified: 2012-05-05
I have Vista Home Premium. After each startup the hard drive light shows a lot of activity for several minutes. After adding "I/O READ" and "I/O Other" columns to the Task Manager Processes view I see that svchost.exe is responsible for disk activity. This in turn points to the new AudioEndpointBuilder service which must run to support Windows Audio service.

It appears from the I/O count that the AudioEndpointBuilder service is doing something with every file on my hard drive (perhaps building a database or possibly searching for files associated with audio).

I cannot disable AudioEndpointBuilder without also disabling Windows Audio. If I "End Processs" the scvhost.exe instance that is associated with AudioEndpointBuilder it will stop the Disk activity for a short period of time but then something restarts it again.

I really dislike having any service that hammers on my hard drive like this after each startup. Can you confirm that other Vista Home Premium PCs have increasing "I/O reads" & "I/O others" when viewed in Task Manager for the svchost associated with AudioEndpointBuilder and propose a way to put a stop to this type of I/O activity without stopping Windows Audio?
Question by:jdwarren
    LVL 15

    Expert Comment

    Hello jdwarren,
    Can't say a had the same problem but i did had a lot of I/O on my disks.
    After installing the following two patches, the system was more stable and much faster.
    good luck,

    Author Comment

    Thanks. But-
    Turns out Windows Task manager mislead me as it was not AudioEndpointBuilder after all. Turning off the SuperFetch service puts a halt to this I/O performance issue at startup. Now that I understand it - this simply comes down to another personal Vista tweak preference. The preference being are 1) you willing to let the OS take a little longer when you first open an application? or 2) do you want to let your hard drive get hammered for several minutes every time you startup (possibly along with your CPU)?  My personal preference is now to disable SuperFetch.

    I will accept what I just wrote above as the solution to anyone who verifies it is true on another Vista computer and submits a similar comment (or if proven wrong I will consider any other proposed solutions  as well).

    Author Comment

    OK. The Microsoft performance upgrade pointed at in the link provided by Walter was released on 8/7/2007 and includes a fix to "Poor memory management performance occurs". See

    Since this is a very recent release and maybe not available yet via windows automatic updating, I went ahead and installed it.

    One more comment - Since the problem I experienced could be eliminated by either turning off the audio services (inluding AudioEndpointBuilder) or the SuperFetch it occurs to me that there is likely some unknown conflict that  between these services as they are starting up (especially with dual CPUs). To further reduce this possibility I am now starting the SuperFetch service (Automatic, Delayed) instead of disabling it.

    My I/O issue on this computer is now resolved.

    Author Comment

    Thought it was resolved but it turns out that Superfetch when started (Automatic, Delayed) was delayed long enough to make me think everything was OK but excessive Disk I/O issue always will come back eventually.

    Watching Task Manager I see that things are being cached into memory until all Free memory is entirely soaked up. The more memory you have ---> the longer it takes. In my case I have a total 2 GB of memory and it takes several minutes of hard drive activity to cache everything into the remaining 1.4 GB of free memory after starting up. A lot of new inexpensive computers with Vista are only configured with 1 GB of memory and in this case only about 0.4 GB of free memory  is available for caching and probably does not take as long  and goes mostly unnoticed by the user.

    If you have lots of memory (2-4 GB) then disabling Superfetch will be only way to prevent excessive hard drive activity after startup. This therefore becomes a personal preference Vista Tweak.
    LVL 1

    Accepted Solution

    PAQed with points refunded (250)

    EE Admin

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    What Security Threats Are You Missing?

    Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

    Suggested Solutions

    Title # Comments Views Activity
    windows image 7 531
    VISTA wont install SP2 12 335
    Converting ntfs 3.0 to 3.1??? 9 153
    Forgotten Admin Password Windows Vista 7 42
    Hi All Just a quick one for everybody. I was recently looking into setting the default User Account Picture for all my vista clients within the network but on closer inspection the group policy setting only allows you to set the default pictur…
    There are many reasons a PC runs slower than when it was new, ranging from malicious software intended to mess things up to simple general Windows use.  Your PC performance may slowly degrade over time without you noticing but when you buy a PC from…
    The Task Scheduler is a powerful tool that is built into Windows. It allows you to schedule tasks (actions) on a recurring basis, such as hourly, daily, weekly, monthly, at log on, at startup, on idle, etc. This video Micro Tutorial is a brief intro…
    In this seventh video of the Xpdf series, we discuss and demonstrate the PDFfonts utility, which lists all the fonts used in a PDF file. It does this via a command line interface, making it suitable for use in programs, scripts, batch files — any pl…

    779 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    12 Experts available now in Live!

    Get 1:1 Help Now