Windows Server Essentials 2016 Dropping Mapped Drives

Hi Everyone,
I have a client with Windows Server Essentials 2016 server.  Its managing DNS but not DHCP.  All the clients are Windows 7 64 Pro PC.  I have one PC that keeps dropping the mapped drives. Ex middle of the day they disconnect.

I tried a variety of remedies including changing the network cable, changing where the Win7 computer is connected (different wall data port).  Updating NIC firmware (as well as BIOS & Chipset).  I even wiped/re-installed Windows 7.

Note: I have DNS on the Win7 machine set to the IP of the server.

Any suggestions?
PAMurilloAsked:
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Tahir QureshiSystem AnalystCommented:
try to run sfc /scannow


Does it loose only mapped drive connectivity
does it disconnect the network connectivity as well
when was it happening

there may be event Log, have you read the logs
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JohnBusiness Consultant (Owner)Commented:
Any chance of letting the Server manage DHCP? It works much better this way.  Then the workstations can be vanilla DHCP (no special settings).
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Andy MIT Systems ManagerCommented:
When the drives drop can the server (or other devices) ping the computer in question? Can the computer get onto the internet when this happens? Does it happen if you set the computer with a static IP/dns settings?

Could be a faulty NIC - do you have any spare PCI NICs you can put into the computer to test? (If not you should be able to pick one up for a small cost from any computer store).
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PAMurilloAuthor Commented:
@tahir

Let me review the logs and she sfc /scannnow is a good idea

@john
The setup is with an ATT router and you cannot turn off DHCP.  I may opt for installing a router behind it an setting up DHCP on the server connected to the 2nd router with DHCP off.

I just got more information from my client as I posted this question and will update you both asap.
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JohnBusiness Consultant (Owner)Commented:
You can put a router behind the ATT router/modem and then ask them to put it in Bridge Mode, or just assign the Modem IP and put your internal network on a different subnet . Then use the server for DHCP.
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Shaun VermaakTechnical Specialist/DeveloperCommented:
Run this command as admin to disable auto-disconnect feature
net config server /autodisconnect:-1

Open in new window

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PAMurilloAuthor Commented:
@Shaun & @John,
Thanks for the suggestions guys.  I'll remote in to my client's system asap and let you know.  If Shaun's suggestions doesn't work, I think the ultimate solution is John's solution
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PAMurilloAuthor Commented:
Guys, All your answers were very helpful.  Unfortunately my client was purchased by a partnership and myself as well as other vendors were not asked to continue providing service.

@John
Although ATT equipment cannot be put into Bridge Mode, my ultimate solution would have been to install a router behind the ATT router/gateway.

@Andy
I did a firmware upgrade and ran a diagnostics test.  Diag test came back OK
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JohnBusiness Consultant (Owner)Commented:
Thanks and I was happy to help.
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Shaun VermaakTechnical Specialist/DeveloperCommented:
Glad we could help.
Please remember to endorse my, or any other expert's comments that you found helpful by clicking on the "Thumb's Up" button
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