Garmin GPS not recognized

I have a Garmin Nuvi 3490 GPS that works perfectly, but I want to update the map. When I plug it into my laptop's USB ports using the Garmin cable, however, I get into the "mass storage" mode, but also receive a message from Windows 10 the the USB device is unrecognized. I have reset the device several times, and tried a similar cable without success. I am reluctant to reset the device to "factory" standards for fear that I'd lose the map data that's already in it. The battery is charged. I have downloaded and installed Garmin USB drivers, and I have the latest version of Garmin Express. I also tried to use Garmin "Updater" without success. When I plug the device into a USB port, the laptop chimes, and I can find the Nuvi under the printers and devices menu, just not under "My PC." My online searches have revealed no solution.
Ward DeWittAdministratorAsked:
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timgreen7077Exchange EngineerCommented:
Have you verified that Windows 10 supports this device. Also here a microsoft link that may help you.
☠ MASQ ☠Commented:
As you know you should see two devices open on Windows Explorer when you plug in the USB, the USB Storage component and the Nuvi's memory with the Maps, GPX folder, etc.

I guess you've already tried

You have the updated version of Express so the bit version of the storage in the Nuvi is not the issue (can you read/write to the USB storage part?).

The most likely reason is that your USB port is underpowered, try a different port or if possible a powered hub.

More obscure possibilities are:

Might be worth checking if there's a .net update available for your Win10 install
As .net 3.5 was broken in the Anniversary Update for some apps and Garmin Express needs it for some functions

Also Tom Barkas' reply in this thread
Is specific for connecting the nuvi

Change the device settings from Media Transfer Protocol (MTP) to standard Mass Storage Mode instead

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Ward DeWittAdministratorAuthor Commented:
I have Garmin Express 6.5.1 installed, which Garmin claims to be current, but thanks for your interest.
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Ward DeWittAdministratorAuthor Commented:
Garmin specifically says NOT to plug into a hub. My laptop is a gaming MSI GS60 which has fully powered USB ports, or so I'm told. Also, I have my computer set to automatically update all Microsoft features, so I assume that I'm current with .net. Since you point out that the latest release of Garmin Express fixes the prior Windows 10 troubles, I think that should be ruled out as well.
Ward DeWittAdministratorAuthor Commented:
As i mentioned in my original post, I can find the Nuvi under "Printers and Devices," but not on the desktop under "My PC." Unfortunately, that means that it will not update. BTW, I am operating the laptop while it's plugged in, not on battery.
☠ MASQ ☠Commented:
Nice laptop, I got to borrow a Ghost Pro for a while.

The only reliable port for power would be the one on the right ahead of the memory card slot.  If it's not being recognised when plugged there then we can indeed rule out power as an issue.  The three other ports don't have any additional capacity.

You're right that Garmin like to exclude external hubs but for troubleshooting adding external power is a useful option.

If it's a case of "none of the above" though and you've switched storage modes on the nuvi to mass storage then we're really left with a factory reset removing all your data.

One other outside possibility could be security software, if you have anything other than Defender running maybe disable that temporarily to see if it's blocking the connection.
Ward DeWittAdministratorAuthor Commented:
I disabled my virus protection, and I am plugged into the port that you suggested. I agree that "factory" reset might prove to be the cure, but I worry, as you might imagine, that Garmin might not recognize my device thereafter, thereby rendering by functioning (but outdated) device a useless brick. I was hoping for a resurrection with less risk.
Ward DeWittAdministratorAuthor Commented:
I'm not sure, but this might be the solution I was looking for, because changing USB ports on my laptop didn't help, but plugging into a different laptop did. I have a GS60, which is a gaming computer by MSI, so I thought it would have sufficient USB port power, but maybe not, because Garmin Express on an HP machine installed perfectly and recognized my Nuvi 3490 quickly. Disappointing, to say the least regarding my machine, but appears to have solved my problem. The bottom line for me, if your device doesn't work on your computer, try another one. It might work for you.
Edward  YeagerMusic ComposerCommented:
I too had the same problem with my Garmin device and then I contacted for further clarification they provided me the best solution which is guided by step by step procedure to solve this query. I would recommend you to call once and sort all the clarifications regarding Garmin Nuvi 3490 GPS
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