The Most Common Mistake People Make When Creating Windows or Linux VMs

I encounter this common issue when taking over support responsibilities for my employer’s customers. Some VMs experience repeated blue-screen errors as known as Blue Screen Of Death (BSOD), and after a quick check, I usually find that they have not been updated for a long time and never reboot for first time installation.

Most unprofessional, i need to rollback, luckily that server is not database and just for application reading.

When setting up a new Windows or Linux virtual machine (VM), most people jump straight into installing software, configuring services, or deploying applications. However, there’s one very common mistake that often gets overlooked:

❗ Not updating the VM before using it.

Whether you’re using Proxmox, VMware, Hyper-V, Nutanix, or any other hypervisor, updating the system should always be the first step after installation.

Why Updating First Is Important

  1. Security Patches

Fresh installations usually come with outdated packages or missing security patches. Leaving these unpatched can expose your VM to vulnerabilities.

  1. System Stability

Updates include important bug fixes that improve the OS stability and performance.

  1. Better Hardware & Driver Support

Hypervisors often rely on updated kernel modules, guest tools, and drivers. Updating ensures better compatibility.

  1. Avoiding Package Conflicts

Installing software before updating can lead to package version conflicts, especially on Linux systems.

Examples


🔹 Windows VM

After installation:

Run Windows Update

Update drivers / VMware Tools / QEMU Guest Agent (depending on hypervisor)

Reboot if required

🔹 Linux VM (Ubuntu, Debian, RHEL, CentOS, etc.)

Run updates immediately:

Debian/Ubuntu:
sudo apt update && sudo apt upgrade -y

RHEL/CentOS/Rocky:
sudo dnf update -y

You may check your OS command with community or official website

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