Windows was unable to install the modem RRS feed

  • Question

  • Attempting to install any modem, I get an error message

    "Windows was unable to install the modem"


    Now I know that this problem is documented with service pack two, and it is supposed to be a subkey with deleted entries. All you havet o do is to set them back to normal. The only problem is that the subkey is intact, so this is not the problem. I would imagine, though, that it is something very similar. A different subkey perhaps.

    Anyone help?

    Saturday, December 23, 2006 7:01 PM

All replies

  • Search for the drivers on modem manufacturers website
    Wednesday, December 27, 2006 10:32 PM
  • Mate, did you ever get an answer to this? I have exactly same problem,old PCI modem failed, "Windows cannot install modem" with different manufacturer PCI modem & different again serial external modem. The subkey is intact. What next?
    Friday, March 9, 2007 3:05 AM
  • Take a look at:
    The thread does not mention that modem installation issue, but creating the missing RunOnce
    registry key worked for me.
    Good luck!
    Wednesday, March 21, 2007 11:15 PM
  • Thanks KaLLi SToi!


    I was banging my head against the wall until I saw your post!


    Tuesday, June 24, 2008 8:01 PM
  • I beleive that the documented fix relates to this:


    "Group"="Extended base"



    But I also found that the keys were intact.  I checked the RunOnce key mentioned in the link in one of the replies and it was also there.  For giggles I removed the key "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Modem\Enum" and the modem installed fine.  I'm using it as I complete this post.


    PS  The computer running Windows 2000 Pro SP4

    Saturday, September 20, 2008 4:58 AM