Archive for the ‘Systems Administration’ Category

Yesterday I get a call from a user that he is unable to access the Internet and receives a “Proxy not Responding” error. I check the proxy server and see no errors in the Event Viewer. I open the Proxy Application and no errors, I check the services and notice that the little icon with that indicates that the server in online is red instead of green. I check windows services and the application has not started. I start the service, it fails; time to check deeper, SQL Server services are online I proceed to check the SQL Server Configuration Manager and WHAM!:


Cannot connect to WMI provider. You don not have permission or the server is unreachable. Note that you can only manage SQL Server 2005 and later servers with SQL Server Configuration Manager. Invalid class [0x80041010]

I had dealt with this issue before but I forgot to document it, so I visited Microsoft | Developer Blog

Worked like a charm, Proxy server is operational, User is happy and so am I.

Don’t forget to leave a reply!

Merry Christmas 2017!


I recently has an issue with My Lync Server 2010, after the CA certificate expired, long story short, I had to renew the Lync server 2010 Certificate that ensures secure transport.


To fix the issue go to: Microsoft TechNet-Renewing Lync Server 2010, 2013 Certificates, now before you start Remember to:

  1. Open the Lync Server 2010 – Deployment Wizard (in my case)LyncServer2010DeploymentWizard
  2. Install or Update Lync Server SystemInstall-Update-Lync-Server-System
  3. Select Step 3: Request, Install or Assign CertificatesStep3

after this follow the TechNet instructions once you are done remember to execute Step4 ” Start Services” step4.png now you are good to go services are up and running and the error is gone.

🙂 Enjoy

I’m working with a customer that has issues with their application and I had to check SQL Server Configuration. I connected to the SQL Server Configuration Manager and received the following error:

Error message when you open SQL Server Configuration Manager in SQL Server: “Cannot connect to WMI provider. You do not have permission or the server is unreachable”


I checked Microsoft Support web page, after implementation the SQL Server Configuration Manager was operational and Issue was corrected.


Special thanks to Microsoft Support Team!

Enjoy! 🙂


Event 36870, Schannel: A fatal error occurred when attempting to access the SSL server credential private key. The error code returned from cryptographic module is 0x8009030D. The internal error state is 10001.


A solution was found on Ask the Performance Team Blog I applied the solution, tried to Remote Desktop Connection to the Server and a pop-up with error:

An Authentication error has occurred. The Local Security Authority cannot be contacted…


… I forgot the cardinal rule:

After making permission changes, Reboot.

After a restart of the server, Remote Desktop Connection was successful.

A special thanks to the “Ask the Performance Team Blog“.

Enjoy. 🙂

During a training session with Microsoft Hyper-V  trainees were asked to create and delete checkpoints a particular trainee found herself unable to delete the checkpoint from GUI.


As I’ve seen this before many times, I instructed the trainee to open PowerShell and execute the following command: “Get-VMSnapShot -vmname test1”


and there we see the snapshot VMNAME: Test1 – Backup – ( 07/27/2017 – 6:03:10 PM).

Now we must delete the snapshot executing the previous command: “Get-VMSnapShot -vmname test1” and adding “| remove-vmsnapshot”.

Get-VMSnapShot -vmname|remove-vmsnapshot

Once the snapshot is removed Hyper-V will begin to merge the data and reconcile the changes.


No snapshots left, and I was able to continue the Hyper-V training.


I’ve recently found myself dealing with GPT protected partitions on HP Proliant Servers on which I’ve created Arrays using “Intelligent Provisioning App” to manage Storage. As with any Array configuration:

  1. Add the discs to the enclosure
  2. Create and array
  3. select the discs in the array
  4. Commit changes

and you are done, but recently after running that same procedure when I boot to Windows or VMware I am unable to use the provisioned array. On Windows when I go to the “Disk Manager” it appears as “GPT Protective Partition”



I tried a couple of things on the GUI but nothing seemed to work, either because the control were grayed or would get errors. I decide to try it “Old school” and use “Diskpart”


  1. Open “Command Prompt” as Administrator
  2. Enter command “Diskpart”
  3. Then command “List Disk”gpt-list-disk
  4. Then command “Select Disk” and the disk number, in this case I will select disk 2gpt-select-disk
  5. Now command “Clean” this command will wipe the partition on the disk.gpt-clean

The disk has been cleared of any “Protectiveness” and is ready to be configured. I executed command “List Disk” to show that the disc is free.gpt-unknown-disc



Now you can configure the disc to you hearts content. I hope this information was useful. Enjoy!

A couple of days ago I received a call from a Colleague that was working on a VM with Windows Core 2008 R2 Domain Controller that had an issue and they needed to disable the network connection.

*To perform this task you must be logged into the console, no RDP.

  1. First Login to your server (must be able to elevate CMD or Power Shell with Admin Privileges)
  2. Execute command: “netsh interface ipv4 show interface” this will show you a list of all available ipv4 network adapters and their names.netsh-show-interface
  3. Here is the tricky part you need to know which interface you will disable. In this exercise I will disabled the Wi-Fi network adapter.  netsh-show-interface-show
  4. Now that we’ve picked our network adapter we will execute command to disabled it: “netsh interface set interface Wi-Fi disable”. netsh-disable-interface
  5. Now we will confirm that the adapter was disabled, by executing command: “netsh interface ipv4 show interface” .  As you can see on the image below the Wi-Fi adapter is no longer available, because it was disabled.netsh-show-interface-disabled-not-show
  6. Now we will enable it by executing the command: “netsh interface  set interface Wi-Fi enabled”. netsh-enable-interface
  7. Now we execute command: “netsh interface ipv4 show interface” and we can now see the Wi-Fi adapter is visible and enabled.netsh-show-interface-show

This command works on servers and workstations it’s not limited to Windows Core. Have a nice day and Enjoy.