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Windows 7: Win 7 Explorer Not Show Network Drive

24 Aug 2011   #1

Windows 7 Ultimate 64 bit
 
 
Win 7 Explorer Not Show Network Drive

I am having a weird problem with networking in Windows 7 x64. I have a router based network that has my Internet connection, a Synology NAS device, a Thecus NAS device, and a Lexmark networked printer along with my computers. All of these devices except the computers stay on all the time (on UPS power). Normally, when I boot up my Win 7 computer, open Windows Explorer from the permanent icon, and select to expand the Network, I see all the devices by name. However, my computer was away for a week getting repaired, and when I booted up after its return Explorer only showed the computer and the Synology NAS (named DS211J). I tried rebooting, but the same thing happened. In particular, the Thecus device (named n7700pro) is no where to be found. After some trials, I discovered that, if I type the exact name of the Thecus NAS (\\n7700pro) in the top bar of Explorer, I get a logon screen, and the device now shows up under Network and its folders are showing in Explorer. However, this does not last. If I move around and do other things, when I come back to Explorer the n7700pro device is missing again until i manually enter it into the top bar. The only difference to my knowledge is that the Thecus has a fixed IP address and the Synology uses DNS from the router for its address. However, before I sent the computer away, they both showed up every time I login. I am at a loss for what to do. By the way, I have no problem finding the Lexmark networked printer. The Thecus does have Samba/CIFS service enabled.

Interestingly, when I go back to my old Win XP computer (I have been using it while the new one was being repaired), that version of Explorer has an option to show the entire network. I can then select Windows networking and it shows two domains (WORKGROUP - most devices and MYGROUP - N7700pro). Under those domains it shows the NAS drives, and I can access them there. With the Windows 7 Explorer, however, that option is not available. Explorer presumably automates the discovery of devices and shows all that it found. But when it does not find something, I cannot determine any way to manually show the network as with WIN XP.

I searched on this issue, and found some networking threads, but not this one. Some of the threads I found suggest changing administrative settings for local authentication (mine is undefined), but I don't want to do that unless I am absolutely sure it is the issue because it cannot be reversed. Any advice will be appreciated. Thanks.


My System SpecsSystem Spec
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24 Aug 2011   #2

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64 Windows 8.1 x64
 
 

Hi Mark,

I suspect the problem might be related to the credentials for automatic logon - I had a similar issue with my Thecus N2200.

What exactly was repaired on the computer? Are you logging onto your PC with the same name and password?

Regards,
Golden
My System SpecsSystem Spec
25 Aug 2011   #3

Windows 7 Ultimate 64 bit
 
 

The computer was experiencing abnormal shutdowns apparently related to the video GPU. I was told all they did was repaste the heat transfer elements on the CPU and GPU, and then they could not make it fail. As far as I know, there were no software changes of any kind. I have no admin password set in Windows, so that is not different. When I manually enter the Thecus device name in Explorer, it immediately asks me to log on, and I use the same account name and password I have always used. Before, it would show the Thecus under Network even before I logged on. It just would ask me to log on if I tried to expand the folders.
My System SpecsSystem Spec
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25 Aug 2011   #4

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64 Windows 8.1 x64
 
 

Hi Mark,

The fact that you can connect to the NAS from Windows Explorer but not automatically at login suggests the credentials have gone haywire.

Can you try the following?

1. Click Start Orb, and in the search box type credentials
2. From the list, select Manage Windows Credentials

You should see a panel similar to the one shown below. Is your NAS listed on this panel?

Win 7 Explorer Not Show Network Drive-capture1.png

If it is, click the arrow to expand the NAS details. Click the Edit button, and you should see this panel:

Name:  Capture2.PNG
Views: 642
Size:  114.3 KB

Ensure that the User name is shown as:

User@ComputerName

The password is the password of your NAS user, not your Windows logon password.

Can you confirm this is the case? If so, you can try deleting that credential and re-creating it again, then reboot the PC.

How did you originally map this NAS/drive in Windows Explorer? Which credentials did you use?

Regards,
Golden


My System SpecsSystem Spec
25 Aug 2011   #5

Windows 7 Ultimate 64 bit
 
 

Thanks. That is a good idea. Actually, the computer started acting up again today, so I had to RMA it back to the manufacturer. Seems to have an intermittent hardware problem. I will try what you say when I get it back. I do not have that NAS drive mapped. Up to now, when I logged into Windows 7, and expanded Network in Explorer, it would show the Thecus and the Synology just as the device names. However, they were not logged on, and they did not show up with a drive letter as would a mapped device--just under Network. The first time I tried to expand the device to see the folders I would get a login screen. So Windows seemed to detect the presence and let me know even before authentication. However, there could still be some kind of authentication error. I will check that out. Thanks.
My System SpecsSystem Spec
25 Aug 2011   #6

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64 Windows 8.1 x64
 
 

No worries - post back here when you get it back.
My System SpecsSystem Spec
17 Sep 2011   #7

Windows 7 Ultimate 64 bit
 
 

I am now working with a new Windows 7 computer. As before, I cannot normally see any other devices on my network under Windows Explorer. At this point, I have reset my router and loaded the latest firmware (Dlink Dir-825), and I have made sure all devices on the network identify with Workgroup. However, when I logon and select to expand the network in Explorer, nothing is discovered. If I type the name of my NAS, for example \\n7700PRO in the search bar at the top of Explorer, it finds that NAS and gives me a logon screen immediately. However, the N770PRO still does not appear under Network. It stays in Explorer only until I navigate somewhere else. When I try mapping the network, no devices except my router and computer are indicated. (By the way, when the discovery starts working for no known reason, the map shows the other devices, but only as icons along the bottom saying it cannot place them in the map) I checked the credentials. There are no windows credentials set. I went into advanced option for Network and Sharing, and turned on discovery for all types of networks. I also set to allow 56 bit encryption, and I disabled Home Networks by saying to always use passwords with Home Networks. Finally, I went under Admin Tools, Services, and made sure that SSDP Discovery, TCP/IP NetBIOS Helper, Computer Browser, and Server are all automatic and started (all were started, but some were manual). If I use the network drives for a while (by manually entering their names), from time to time Explorer starts showing all the devices on the network (N7700PRO NAS, DS211J NAS, and two computers. It will continue to work through reboots. However, this goes away after a while or when I restart the next morning. As a final test, I downloaded the program Network Magic from Pure Networks/Cisco. When I run a map with this program, Network Magic seems to find my two networked printers, one of the NAS devices as an unknown device (nothing known about it, not even the name), and the other NSA as another printer. This all suggests to me that perhaps there is another service I am missing that is not turned on which helps to discover intelligent device like computers and NAS devices on a network. When that service gets started, it can keep track of the found devices until the service goes away. Alternately, perhaps Windows 7 cannot discover these names and types of devices by doing a general broadcast or scan of the network, and Explorer ignores any IP addresses it cannot determine that are not recognized as capable of file sharing. My trying to manually access (or use backup programs) somehow 'registers" the device names, and Windows looks for those names when it boots up for a at least a while. I hope someone can help me. I have had the Thecus N7700PRO and both computers since last May 2010. I don't recall issues finding these NAS drives until recently. The only change is that my 3 year old Iomega network drive died, and I replaced it with the DS211J unit. However, I don't want to say that his is related to the DS211J. I tired my network wiith that NAS powered off, and it did not change any of the symptoms. This is very frustrating. I nope someone has dome idea. thanks.
My System SpecsSystem Spec
17 Sep 2011   #8

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64 Windows 8.1 x64
 
 

Mark,

You will not be able to see any devices under the Network Map that do not use LLTD (Link Layer Topology Discovery) - usually these devices are shown near the bottom of the map. Thecus does not use LLTD, so doesn't appear in the map - this is the same with my Thecus at home.

See this for more info:

Network Map - View Networked Devices

Regards,
Golden
My System SpecsSystem Spec
18 Sep 2011   #9

Windows 7 Ultimate 64 bit
 
 

Golden,
Thanks. That is the most direct and informative information I have seen. It shows why my Thecus and Synology devices do not show up on the network map. However, your example of the Linux computer suggests that a device can be discoverable, just not mapped properly. My Thecus and Synology devices do not normally show up on the map at all -- even at the bottom. It is as though they did not exist or where hidden until I address them specifically by name or IP address. As I noted, sometimes after I use one of them for a while after manually accessing them, they all start to show up (still at the bottom of the map). So there must be some sort of discovery besides LLTD that allows Win 7 to see a device but perhaps not get further detail on it. That should be fine for me because if it shows up under Network, I can click on it to log on. Did I get this wrong? Do you have any idea why the Thecus and Synology do not seem to be discoverable at all?

Not as good, but is there a work around? Perhaps defining the NAS drives to Windows so it will look for them whenever it encounters that network? I know that I used to see them under Networks, so I must have done something earlier perhaps by the installation assist programs provided to first install and configure each NAS device.

Thanks.
My System SpecsSystem Spec
18 Sep 2011   #10

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64 Windows 8.1 x64
 
 

Quote   Quote: Originally Posted by marklang View Post
However, your example of the Linux computer suggests that a device can be discoverable, just not mapped properly. My Thecus and Synology devices do not normally show up on the map at all -- even at the bottom.
Yes, you are 100% correct - they can be discoverable despite not being LLTD compliant.

In fact, on my laptop running Windows 7 Home Premium x86 my Thecus shows at the bottom, yet on my desktop running Windows 7 Ultimate x64 it doesn't show at all - yet is used too! I don't worry about it too much since the drives are mapped as network drives....but still I don't know what changed.

I'll do some more digging and post back if I find something....I have a feeling its a setting in the NAS, but I need to check.

Check this out for more information on Network Discovery:

Network Discovery - Turn On or Off in Windows 7

Regards,
Golden
My System SpecsSystem Spec
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