Thursday, 29 September 2016

Troubleshooting:Domain computers drop network connection for one hour then automatically reconnect Error

Domain computers drop network connection for one hour then automatically reconnect

I have several computers that will drop connection from my DC (which is also my DNS, DHCP server) every week at the same time for exactly one hour and then they reconnect by themselves.
This happens every Thursday from 10:15-11:15 and Friday from 11:15-12:15.
 This seems significant to me.
 I can ping other servers and workstations (by IP address) but I cannot ping my DC.
This lasts for exactly one hour.
I have tried rebooting the pcs, flushing dns, releasing and renewing IP, I have even tried restarting DHCP and
DNS services on the server.
I estimate about 40 of the 130 pcs appear to lose their connection.
If there are more, they haven't complained.
My computer never loses connection.
All pcs are Windows 7, my domain is Server 2008R2 and I only have one DC.

I am also experiencing a backup issue, but I'm not sure this is related, could be something totally different but figured I'd put it in here just in case they are possibly related.
 Backup Exec error:
Directory C:\Windows\SYSVOL\sysvol\sja.local\DO_NOT_REMOVE_NtFrs_PreInstall_Directory was not found, or could not be accessed.
Backup- Shadow?Copy?Components
VSS Snapshot warning.
File F:\RemoteInstall\Setup\*.* /s is not present on the snapshot.
Backup- System?State
VSS Snapshot warning.
File c:\windows\system32\drivers\dtsoftbus01.sys is not present on the snapshot.
Any help would be very much appreciated.

Solutions to the Problem Domain computers drop network connection for one hour then automatically reconnect

Download SmartPCFixer for Free Now


 Domains, large networks, and Windows Server versions are supported via TechNet
so best to check with the Experts there.

TechNet - Windows Server (Server 2008 R2 Forums are locked so you will need
to use the other forums for current support)
TechNet - XP, Vista, Windows 7, and Windows 8 IT Pro,w8itpro,windowsvistaitpro,windowsxpitpro,windowsintune

TechNet - Forums

TechNet - Where is the Forum For…?

Hope this helps.

Rob Brown - Microsoft MVP <- profile - Windows Expert - Consumer : Bicycle <- Mark Twain said it right!

  1. Access the files on your computer via MY COMPUTER
  2. Under the C: drive, access the WINDOWS folder
  3. Select the SOFTWARE DISTRIBUTION folder, followed by the DOWNLOAD folder.
  4. Delete any files within this download folder.
  5. If you are unable to delete these files, open the command prompt (CMD) as the administrator, and type "net stop wuauserv" into the CMD prompt window. Press ENTER. This should allow you to delete the files from step 4.
  6. Once the files are deleted, open and run the CMD as the administrator and type "wuauclt.exe /updatenow". Press ENTER.

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