windows

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    Windows 11 VM Issues

    Hi everyone, In order to avoid the performance penalty of using host (md_clear, flush_l1d), I started using 'x86-64-v4' which works perfectly but I can't pass hypervisor flags to Windows VM. I tried creating custom cpu configuration using( cpu base, EPYC-Genoa, etc..) and add/removing...
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    Collection of Scripts to Uninstall/Remove VMware-Tools in Windows; Post Migration

    This is a quick post just to point to a Gist with a collection of scripts to assist with removal of `vmware-tools` post migration to pve. These are all just minor refinements of the scripts found in other Gists which are given attribution in the scripts and Gists. Cleanup-VMwareTools.ps1...
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    [TUTORIAL] Windows Guest OS customization - WinRM way

    Hey everyone, With a heavy dose of AI assistance, I built the Proxmox GuestOS Utility to automate the process of cloning and modifying Windows VMs. Being network person working as sysadmin in recent months, this code is most probably not the best one. It's a Flask app that gives you a web UI...
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    ZFS für VM Disks - Mirror oder RAIDz

    Hi zusammen, ich arbeite mich gerade in das ganze Thema PVE. Am Ende sollte auf der PVE Node folgendes laufen - Homeassistant - Windows Server 2022 Domänencontroller (der sekundäre meiner Domäne) Im Rechner drin ist ein LSI 9300 HBA. Daran insgesamt 5 SSDs (PM Serie von Samsung). 2 x 240GB...
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    Windows & Linux VDI VMs feels So laggy

    Hi everyone, I'm struggling with a very laggy RDP experience on my Proxmox cloud server. Host: 12 CPU, 128GB RAM, 1Gbps bandwidth. Network: VMs on vmbr1 (10.10.10.0/24), using iptables on the PVE host for RDP port forwarding. The Problem: RDP to both Windows and Linux VMs is slow and...
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    [SOLVED] Linux packages auf Windows installieren

    Servus, Hätte eventuell hilfe gebraucht denn mein Problem gerade ist das ich kein internet auf meiner VM habe aber dafür trozdem noch internet zugriff habe auf meinen Notebook, was meine lösung ist, das ich die Package von den Apache webserver auf meinen Notebook installiere und dann zu meiner...
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    Troubleshooting Windows Application Error

    Hii, I'm fumbling with this Application Error when compiling Unreal Engine on a fresh Windows VM with latest iso from Microsoft as well as latest VirtIO. Specifically its cl.exe, version 14.42.34 with exception code 0xc0000005. Here's list of things I've tried: - Increasing page file -...
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    PVE 9 and Windows 2025 Iso : error 0xc000014c /efi/microsoft/boot/bcd

    Hello I'm making this post to report an issue, there is a workaround and it is not really blocking, but could be annoying for someone, and it made me lose a few hours to "fix". a fresh installation of PVE9 on a test machine, iso 9.0.1 (and also upgraded to 9.0.4 with the no subscription repo...
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    Proxmox/Ubuntu/Plesk, Windows/Domäne, DNS-Nameserver?

    Hallo, ich habe Proxmox mit einer VM Ubuntu-Server/Plesk in einem VLAN innerhalb einer Windows-Domäne am laufen. Ich habe eine Domain: inhalt.DOMÄNE.local erstellt und habe bei dieser Domain unter DNS-Einstellungen "In sekundären Server verwandeln" aktiviert und die IP des DNS-Server der...
  10. S

    Windows XP SP3 w/GPU Passthrough

    Hi all, So I've been experimenting with UnRaid and Proxmox for a little while now. I'm in no terms and expert at either but have worked in hardware for many years so do have a good understanding of the theory of passthrough and virtualisation. I did unfortunately give up on spending more time...
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    [SOLVED] Display output is not active issue

    Hello, I have a VM running a Window Server (2022 if I'm not wrong) and I was told today that it's unreachable. Upon opening the console, the message "Display output is not active" is present on the console. What happened? Tried to reboot the VM, migrate it to a different host, etc. VM's config...
  12. M

    Windows virtualization with GPU passthrough

    Good day, so I would like to run a Windows guest on Proxmox. Basically, this is nothing new and I have done it successfully already many times. However this one seems a bit more special to me. I currently have a single PC that has fast RAM, and a GPU, for finite element simulations. The PC is a...
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    How to make OpenGL work from a discrete card on a software noVNC display?

    I have a win10/11 VM that is used via noVNC (RDP cannot be used), but I need hardware OpenGL. I know that if you insert a discrete video card into a computer with integrated graphics and connect a monitor to the integrated graphics, then it may or may not have OpenGL provided by the discrete...
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    [SOLVED] Some Windows VMs start with incorrect clock

    We have a handful of Windows Server VMs in our cluster (just migrated to Proxmox). I've noticed when some are shut down, they start with the clock 5 hours in the past. If I log in and toggle the option to have Windows sync the clock, it does so immediately. One that does not need a manual...
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    [SOLVED] Windows Server 2019 not starting after disk rezise

    Hello, I recently rezised the disk of my Windows Server 2019 VM and now it does not boot. Before shutting down, to rezise the disk, the OS did some kind of Updates, i dont remember what. A fter trying to start the VM, it tried to repair the system, then showed a Windows Logo for about 5...
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    Server 2025 VMs unglaublich träge

    Guten Tag zusammen, wir haben auf unserem Cluster das Problem das Win Server 2025 VMs unglaublich träge sind. die 2022er, 2019er, alle Linux Maschinen haben keinerlei Probleme und reagieren flüssig. Einzig allein die 2025er reagieren langsam, File Explorer starten heißt Icon anklicken, bis 5...
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    How do _you_ shutdown your Windows VM?

    I tried the right click and: Shutdown, Reboot, Stop and none of them actually do anything. I just fire up the console for the node and do "shutdown -r now" which seems like a gigantic sledge hammer... So what is the best practice to actually forcibly, "turn off" a VM?
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    Render noVNC/SPICE display using GPU (GPU Passthrough)

    Hello. I want to have a Windows 10 virtual machine that has GPU acceleration and renders the noVNC or SPICE virtual display using the GPU. GPU Passthrough is working. The GPU appears in task manager. I have everything configured (in theory) properly. But, whenever I try to do something GPU...
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    Strange permissions when copying from Win to NAS (LXC)

    Hello, I am not sure if this is the right category but it made the most sense to me. Lately, I tried to change my NAS environment from OMV (VM) to 45Drives (LXC) to share files between the LXCs and via SMB with Windows clients. I followed this Tutorial. Sharing and accessing between different...
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    High VM-EXIT and Host CPU usage on idle with Windows Server 2025

    Good evening, I have been pouring over an interesting problem and it seems like I need some deep insight. Windows Server 2025 Core has much more than expected overhead. I am testing Windows Server 2025 Core (and Desktop) on Proxmox 8.3, with all paravirtualized features enabled and the agent...