> For the complete documentation index, see [llms.txt](https://docs.glesys.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.glesys.com/products/compute/vmware-virtual-machines/how-tos/resize-virtual-machines/increase-the-partition-size-in-windows-vms-created-before-q1-2024.md).
# Increase the partition size in Windows VMs created before Q1 2024
On older Windows VMs, the C-partition needs to be manually expanded.
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Once the disk size has been expanded in the control panel and the Windows VM has been restarted, log in via Remote Desktop. You now need to expand the C-partition.
{% hint style="info" %}
This is only necessary for VMs created before Q1 2024. For VMs created after Q1 2024, the partition will grow automatically.
{% endhint %}
{% hint style="danger" %}
Expanding a disk is not always risk-free, so we recommend taking a backup before performing this operation.
{% endhint %}
Search for *Computer Management* in the Start Menu and click on it when it appears.
Next, double-click on **Storage**.
In the next window, double-click on **Disk Management**.
The C: partition and the adjacent unallocated space are now displayed. Right-click on the C: partition and select **Extend Volume**.
A wizard will now start. In the first dialog box, click **Next**.
In the next dialog box, the amount by which the C: partition will be expanded is displayed. In the example image below, it will be expanded by 10,240 MB, which is the same size as the unallocated space after the C: partition. Once you have verified that the information is correct, you click **Next**.
In the final dialog box, you get a summary of how much the partition will be expanded. Here, click **Finish**.
You are now returned to the disk overview in the Windows system. The C: partition should now be expanded, as shown in the image below. No unallocated space should remain after the C: partition.
