> 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

***

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.

<figure><img src="/files/KXQdwqoXmipP2dd2HGiY" alt=""><figcaption></figcaption></figure>

Next, double-click on **Storage**.

<figure><img src="/files/fi6kqhbOncqzRjyIrsvf" alt=""><figcaption></figcaption></figure>

In the next window, double-click on **Disk Management**.

<figure><img src="/files/Hndkrf962OZxU0TH1xHq" alt=""><figcaption></figcaption></figure>

The C: partition and the adjacent unallocated space are now displayed. Right-click on the C: partition and select **Extend Volume**.

<figure><img src="/files/f1zK5StQXeVTCsxTscis" alt=""><figcaption></figcaption></figure>

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**.

<div align="left"><figure><img src="/files/WTrqX8kASBtCnDYlSaav" alt=""><figcaption></figcaption></figure></div>

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.

<figure><img src="/files/y311XoFxwRCwI3iDGFNP" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET 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?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.