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P4 Virtual File Service Documentation | 2026.1

# Install and upgrade

Before you install P4 VFS, read the Prerequisites.

## Install P4 VFS

To install the P4 VFS desktop client on your Windows machine:

1. Download the P4 VFS client-side agent from the Perforce web site for downloads.

2. Run the installer.

3. Verify that the P4 VFS icon is present in your taskbar:

## Upgrade P4 VFS

To upgrade from an earlier version:

1. Right-click the P4 VFS icon, and choose Quit.

2. Install the new version.

## Uninstall P4 VFS

If you want remove the P4 VFS desktop client:

1. In the Windows desktop search bar, enter P4 VFS and click Uninstall.

2. Make your workspace property be `noaltync` instead of `altsync`.

3. Unset the `P4ALTSYNC` environment variable.

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