Author: Bob Lin

Bob Lin, Chicagotech-MVP, MCSE & CNE Data recovery, Windows OS Recovery, Networking, and Computer Troubleshooting on http://www.ChicagoTech.net How to Install and Configure Windows, VMware, Virtualization and Cisco on http://www.HowToNetworking.com

System Administrator interview questions

  1. Which port does SSH use?
  2. Port 21
  3. Port 22
  4. Port 25
  5. Port 443

Answer: B

  • Which command for Hop-by-Hop Analysis & Troubleshooting
  • IPCONFIG
  • Ping
  • Tracert
  • Net statistics

Answer: C.

  • Why do you receive this warning?
  1. Certificate issue
  2. Use HTTP instead
  3. You get virus
  4. DNS issue

Answer A.

  • You can’t open a website. However, ping IP works.
  • Website is down.
  • Internet is down
  • You should use IP instead of website name.
  • This is DNS issue.

Answer: D.

  • After opening attachment, you can’t open any files because of ransomed.
  • Pay money to hacker to  fix
  • Restore the file.
  • Disconnect the network.
  • Run Windows update

Answer: C.

  • The computer keeps rebooting by itself. What should you check?
  • Check Log file.
  • Reinstall Windows.
  • Check IPCONFIG.
  • Check Event viewer

Answer: E

  • After a Windows update, the user can’t login with Please wait….
  • Run anti-virus.
  • Re-install Windows update
  • Disconnect all external device except keyboard and mouse.
  • Run system restore.

Answer: C.

  • When assigning a Statistics IP address to a network device, which options you may have?
  • Type the statistics IP address in the web browser.
  • Run ipconfig /renew
  • Go to NIC to change adapter settings.
  • Use DHCP reservation.

Answer: D and D.

  • The new Server comes with two hard disks and your boss want a redundancy RAID.

Answer: C

  1. The new Server comes with four hard disks and your boss wants a high performance and security RAID.

A.           RAID 0

B.           RAID 1

C.           RAID 5

D.           RAID 6

E.            RAID 10.

F.            RAID 1+0

Answer: E and F.

  1. Your laptop (mylaptop) has joined a domain, mydomain. Which is options to login Local Windows Account instead of Domain account?
  2. .\username
  3. Username
  4. Mydomain\username
  5. Mylaptop\username

Answer: A and D.

  1. Your boss wants you to upload some secured files to a remote site. What may you use?
  2. FTP
  3. SFTP
  4. FTPS
  5. HTTPS

Answer: B, C and D

Office 365 Couldn’t install with Error code 0-2031 (17004)

Situation: When the client runs Office 365 update or Online repair, he may receive Couldn’t install with Error code 0-2031 (17004).

Troubleshooting: Download Microsoft Automatically Office Uninstallation Tool from this link: https://support.microsoft.com/en-us/office/uninstall-office-automatically-9ad57b43-fa12-859a-9cf0-b694637b3b05

uninstall office 365 and re-install it.

Missing “Show text predictions while typing” in Outlook

Situation: The client has version of Outlook. One of them doesn’t have “Show text predictions while typing”.

Troubleshooting: Run Office 365 online repair by follow these steps:
  1. Type control on the search bar. Open Control Panel.

2. Click on Program and Features.

3. Highlight the Microsoft 365 and click Change

4. Click Yes on popup.

5. Check Online Repair and click on Repair. It may take a couple hours to complete.

The repair could take hours depends on your Internet speed. Now, you may have “Show text predictions while typing” feature looks like this:

Veeam error: Unable to establish authenticated client-server connection.

Situation: The client has Veeam backup problem with this error: 

[29.07.2021 06:52:31] <04> Error Unable to establish authenticated client-server connection.
[29.07.2021 06:52:31] <04> Error A call to SSPI failed, see inner exception. (System.Security.Authentication.AuthenticationException)
[29.07.2021 06:52:31] <04> Error at System.Net.Security.NegoState.StartSendAuthResetSignal(LazyAsyncResult lazyResult, Byte[] message, Exception exception)
[29.07.2021 06:52:31] <04> Error at System.Net.Security.NegoState.StartSendBlob(Byte[] message, LazyAsyncResult lazyResult)
[29.07.2021 06:52:31] <04> Error at System.Net.Security.NegoState.StartSendBlob(Byte[] message, LazyAsyncResult lazyResult)
[29.07.2021 06:52:31] <04> Error at System.Net.Security.NegoState.ProcessAuthentication(LazyAsyncResult lazyResult)
[29.07.2021 06:52:31] <04> Error at System.Net.Security.NegotiateStream.AuthenticateAsServer(NetworkCredential credential, ProtectionLevel requiredProtectionLevel, TokenImpersonationLevel requiredImpersonationLevel)
[29.07.2021 06:52:31] <04> Error at Veeam.EndPoint.Core.CForeignInvokerServer.AuthenticateAsServer(Socket client)
[29.07.2021 06:52:31] <04> Error No authority could be contacted for authentication (System.ComponentModel.Win32Exception)

Troubleshooting: From the log (C:\ProgramData\Veeam\Endpoint\Agent_Backup), we also find: Error [ProxyThrottling] Error while setting throttling, sourceIPs [10.255.255.59,10.255.255.58,10.0.0.104], targetIPs [10.0.0.92]. The target server is multihomed server with two Networks connections (10.255.2550/24 for SAN and 10.0.0.0/16 for LAN).

Resolution: Disable Automatic selection in Backup Repository and change it to The following server.

Veeam Error: Unable to establish authenticated client-server connection.

Situation: The client has Veeam backup problem with this error: Unable to read data from the transport connection: Unable to establish authenticated client-server connection

Troubleshooting: From the log (C:\ProgramData\Veeam\Endpoint\Agent_Backup), we also find: Error [ProxyThrottling] Error while setting throttling, sourceIPs [10.255.255.59,10.255.255.58,10.0.0.104], targetIPs [10.0.0.92]. The target server is multihomed server with two Networks connections (10.255.2550/24 for SAN and 10.0.0.0/16 for LAN).

Resolution: Disable Automatic selection in Backup Repository and change it to The following server.

Veeam Error: Unable to read data from the transport connection: An established connection was aborted by the software in your host machine. (System.IO.IOException)

Situation: The client has Veeam backup problem with this error: Unable to read data from the transport connection: An established connection was aborted by the software in your host machine. (System.IO.IOException)

Troubleshooting: From the log (C:\ProgramData\Veeam\Endpoint\Agent_Backup), we also find: Error [ProxyThrottling] Error while setting throttling, sourceIPs [10.255.255.59,10.255.255.58,10.0.0.104], targetIPs [10.0.0.92]. The target server is multihomed server with two Networks connections (10.255.2550/24 for SAN and 10.0.0.0/16 for LAN).

Resolution: Disable Automatic selection in Backup Repository and change it to The following server.

Veeam Error: No authority could be contacted for authentication (System.ComponentModel.Win32Exception)

Situation: The client has Veeam backup problem with this error: No authority could be contacted for authentication (System.ComponentModel.Win32Exception).

Troubleshooting: From the log (C:\ProgramData\Veeam\Endpoint\Agent_Backup), we also find: Error [ProxyThrottling] Error while setting throttling, sourceIPs [10.255.255.59,10.255.255.58,10.0.0.104], targetIPs [10.0.0.92]. The target server is multihomed server with two Networks connections (10.255.2550/24 for SAN and 10.0.0.0/16 for LAN).

Resolution: Disable Automatic selection in Backup Repository and change it to The following server.

Office 365 error 80090034

Situation: When running Office 365, you may receive Your computer’s Trusted Platform Module has malfunctioned. if this error persists, contact your system admin with error code 80090034.

Troubleshooting 1: Cleared your TPM.

To clear the TPM

  1. Open the Windows Defender Security Center app.
  2. Click Device security.
  3. Click Security processor details.
  4. Click Security processor troubleshooting.
  5. Click Clear TPM.
  6. You will be prompted to restart the computer. During the restart, you might be prompted by the UEFI to press a button to confirm that you wish to clear the TPM.
  7. After the PC restarts, your TPM will be automatically prepared for use by Windows 10.

Troubleshooting 2: Turn on or turn off the TPM (available only with TPM 1.2 with Windows 10, version 1507 or 1511)

To turn on the TPM (TPM 1.2 with Windows 10, version 1507 or 1511 only)

  1. Open the TPM MMC (tpm.msc).
  2. In the Action pane, click Turn TPM On to display the Turn on the TPM Security Hardware page. Read the instructions on this page.
  3. Click Shutdown (or Restart), and then follow the UEFI screen prompts.After the computer restarts, but before you sign in to Windows, you will be prompted to accept the reconfiguration of the TPM. This ensures that the user has physical access to the computer and that malicious software is not attempting to make changes to the TPM.

To turn off the TPM (TPM 1.2 with Windows 10, version 1507 or 1511 only)

  1. Open the TPM MMC (tpm.msc).
  2. In the Action pane, click Turn TPM Off to display the Turn off the TPM security hardware page.
  3. In the Turn off the TPM security hardware dialog box, select a method to enter your owner password and turning off the TPM:
    • If you saved your TPM owner password on a removable storage device, insert it, and then click I have the owner password file. In the Select backup file with the TPM owner password dialog box, click Browse to locate the .tpm file that is saved on your removable storage device, click Open, and then click Turn TPM Off.
    • If you do not have the removable storage device with your saved TPM owner password, click I want to enter the password. In the Type your TPM owner password dialog box, type your password (including hyphens), and then click Turn TPM Off.
    • If you did not save your TPM owner password or no longer know it, click I do not have the TPM owner password, and follow the instructions that are provided in the dialog box and subsequent UEFI screens to turn off the TPM without entering the password.

Troubleshooting 3: Modifying two registry keys may also help you solve the problem.
a) Go to the Registry Editor (press Win + R, enter regedit)
b) Go to HKEY_LOCAL_MACHINE\Software\Microsoft\Cryptography\Protect\Providers\df9d8cd0-1501-11d1-8c7a-00c04fc297eb. Create a new REG_DWORD value called “ProtectionPolicy” and leave the value at 1.
c) Go to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity. Inside “Identity”, create a new REG_DWORD value called “EnableADAL” and leave the value at 0.
d) Restart computer and try again to login from Office 365 to activate it.

Troubleshooting 4: Setup Outlook Manually

If you have this problem to setup Outlook, try setup Outlook manually.