Quite often, VMWare administrators are faced with the fact that the list of virtual machines contains VMs with the Invalid (Unknown) status. As a rule, the issue occurs after deleting a virtual machine, which data remained in the VMWare vSphere/ESXi configuration on some reason. This can also happen after you manually remove VM files from the VMFS storage after running vMotion and in some other cases. You won’t be able to delete such a VM from vSphere Web Client using the built-in tools (the Unregister option in the Actions menu is inactive).
Windows Server: Administration Guides
Step-by-step tutorials and comprehensive courses covering Windows Server installation, configuration, administration, and management. Learn to deploy server roles, manage Active Directory, configure networking, automate tasks with PowerShell, and implement security best practices for Windows Server 2012, 2016, 2019, and 2022 editions. Ideal for beginners and IT professionals seeking practical, hands-on knowledge to master Windows Server environments.
Windows 10 and 11 Tutorials for System Administrators
Guides and technical tutorials for system administrators, focusing on the configuration, deployment, and management of Windows 10 and Windows 11 desktop operating systems. Step-by-step instructions on installation, deployment, policy configuration, security hardening, and administrative tools to optimize Windows enterprise environments.
Group Policy (GPO) Guides for Admins
Clear, concise tutorials on creating and managing Group Policy Objects to control user and computer settings, enforce security, and streamline network administration in Active Directory environments.
- Configuring Firewall Rules With Group Policy
- How to Copy Files or Folders to All Computers with GPO
- Updating Group Policy Administrative Templates (ADMX) Files
- Active Directory Password Policy
- Applying Group Policy troubleshooting guidance
- Deploying printers via GPO
- Running PowerShell scripts using Group Policy
- Local Groups Policies export and import on Windows
Active Directory: Setup, Configuration, and Best Practices
Step-by-step tutorials and comprehensive resources for installing, configuring, and managing Active Directory Domain Services (AD DS). Learn how to set up domain controllers, design forest and domain structures, create users and groups, and implement security best practices.
- Updating AD Group Membership Without Restart or Logoff
- How to Detect the Source of Account Lockout in Active Directory
- Adding an Additional Domain Controller To an Existing AD Domain
- Active Directory Health Check
- Get-ADDomainController: How to Get Domain Controller Information with Powershell
- How to Transfer os Seize FSMO Roles in Active Directory
- Active Directory Backup Best Practices
- How to Reset Domain Admin Password in Active Directory
- Fix Trust Relationship Failed Issue without Domain Rejoining
- How to Extend Password Expire Date in Active Directory
- How to Find Inactive Accounts in Active Directory
Enterprise Virtualization Platforms
Expert guides and tutorials for system administrators on VMware, Hyper-V, and Proxmox virtualization. Covering installation, configuration, management, and optimization to build robust and scalable virtual environments.
PowerShell Scripting Tutorials
Practical guides to automate and manage a wide range of IT tasks using PowerShell. Learn how to streamline system administration, Active Directory, network configuration, software deployment, Microsoft 365 management, and more through powerful scripting and cmdlets.
VMware:Install and Configure Guides
Detailed walkthroughs for installing VMware ESXi, vCenter Server, and VMware Workstation Player, including configuration of virtual machines, network settings, and storage options to optimize your virtual infrastructure.
- VMware ESXi: Create VMFS Datastore on USB Drives
- Configuring iSCSI Datastore on VMware ESXi
- Add Drivers into VMWare ESXi Installation Image
- Adding Sound Controller to a VMWare VM
- Using Free VMware vSphere Hypervisor
- Adding an ESXi host to the VMware vCenter (vCSA)
- Reset VMware ESXi root password
- Disable the Virtual Machine Auto Suspend Feature in VMware Workstation/Player
The Mandatory Profiles feature in Windows allows to create read-only user profiles. A mandatory profile is a special pre-configured type of roaming profile that doesn’t save changes made by the…
- PowerShellWindows 10Windows 11Windows Server 2019
Downloading (Transferring) Large Files Using PowerShell and BITS
April 10, 2024If you need to download (transfer) a large file to a remote computer without overloading the network channel, we recommend using the BITS protocol. BITS (Background Intelligent Transfer service) is…
- Windows 10Windows Server 2019
Fix: Clock Reverts to Wrong Time After Computer (Server) Reboot
March 12, 2024In this article, we’ll consider why the system clock displays incorrect time and date after a shutdown, restart or resuming from hibernation of a laptop/computer/server. Time is reset each time…
Today we’ll talk about opportunities for managing printers and their drivers from the command prompt in Windows 10/ 8.1 and Windows Server 2012 R2/ 2016. We will consider how to…
- PowerShellWindows 10Windows Server 2019
Enable Access-based Enumeration (ABE) on Shared Folders (SMB)
February 25, 2026Access-based Enumeration (ABE) is a shared folder option in Windows that allows to hide files and folders that users don’t have permission to access. ABE is used to hide the…
- Active DirectoryPowerShellWindows Server 2019Windows Server 2022
How To Monitor Group Membership Changes in Active Directory
October 1, 2024It can be difficult to track exactly who made certain changes when the Active Directory domain infrastructure is managed by multiple administrators (added or removed a user from a security…
- Windows 10
Error 0x80073CFA: Can’t Uninstall Apps using Remove-AppxPackage in Windows 10
March 11, 2024Starting from Windows 10 1703 (Creators Update), several new built-in universal apps appeared in the system and you cannot remove them using the standard procedure. For example, when you try…
- PowerShellWindows 10Windows Server 2019
How to Get My Public IP Address with PowerShell
October 24, 2023You can use a simple PowerShell command to find out the current public IP address that your Windows computer uses to access the Internet. There are a large number of…
- PowerShellWindows Server 2019Windows Server 2022
How to See Number of Active User Sessions on IIS WebSite
March 16, 2024How to quickly estimate the current number of user connections (sessions) to the IIS sites on webserver running on Windows Server? Such information will allow to determine and predict the…