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Editorial Team
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Asked: 2026-05-14T15:34:27+00:00

This is a strange driver error which doesn’t make a lot of sense to

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This is a strange driver error which doesn’t make a lot of sense to me.

I am running an application developed in C# .NET which our company develops.

I was monitoring the application using process monitor and noticed that it accesses the registry a lot. The output on Process Monitor looks like this,

Operation      Result           Path
RegQueryValue  Success          HKLM\System\CurrentControlSet\Enum\SWMUXBUS\SW_MODEM\7&6c4af30&0&5&0004\Driver
RegQueryValue  Success          HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Properties
RegQueryValue  Success          HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Default
RegQueryValue  Success          HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\InactivityScale
RegQueryValue  Name Not Found   HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\PowerDelay
RegQueryValue  Name Not Found   HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\ConfigDelay
RegQueryValue  Buffer Overflow  HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Manufacturer
RegQueryValue  Buffer Overflow  HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Model
RegQueryValue  Name Not Found   HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Version

The app is reading this stuff every 5 seconds from the registry, so I would ask a few questions,

  1. What is this stuff?
  2. Why is the app reading this stuff?
  3. Why is it saying ‘Buffer Overflow’?
  4. Could this cause performance problems for my app?

From what I can see the app does not explicitly read this stuff, so I think this relates to a driver on the machine (which is a netbook).

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1 Answer

  1. Editorial Team

    Looks like checking for finding a modem, seems to be some WLAN device.

    “Buffer Overflow” is a normal return value of registry queries where the caller specifies a buffer that is to small. Often, you will query with a zero-sized buffer to determine the size required, and follow up with a second query and a large-enough buffer.

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