Install and activate CCleaner Professional

CCleaner Professional from Lizensa is a licence key. The program comes from CCleaner. This guide explains how to download, install and register CCleaner on Windows.

What you received

Your order confirmation email contains the licence key for CCleaner Professional. The same key is in your Lizensa account under My Library. Also covered: CCleaner Professional 12 months and the 24 and 36 month versions. The licence term is the duration stated in the product name.

• No installer comes with the order. You download CCleaner from ccleaner.com.
• The key unlocks the Professional features. CCleaner Professional needs a valid, active licence key to use features such as the full Health Check.
• You need an internet connection while you install and register.

If CCleaner 5.46 or newer is already on your PC, you do not have to download it again. After you register and restart, it updates itself.

Get the software

1. Open the CCleaner download page.
2. Download the installer for Windows and save it.

Download CCleaner from ccleaner.com only.

Install

1. Double-click the downloaded .exe file.
2. Select Install.
3. If Windows shows a User Account Control message, select Yes.

CCleaner is now on your PC. A registration window may open at once.

Activate

If a registration box opens after the installation, enter your details there. If you do not see it, open the licence screen yourself.

1. Open CCleaner and select Options, then License Key.
2. Paste your licence key. Make sure there are no spaces in the key, including before or after it.
3. Select Next.

If the name field is shown, enter your registration name exactly as it appears in your order confirmation. An email address does not work there.

If a licence is already registered and you enter a new key, CCleaner shows the old licence in License Information. Select Activate New Key to replace it.

Check it worked

Open CCleaner. Open the licence screen. It shows your licence information. If it still shows an old licence, replace it with Activate New Key.

If something goes wrong

CCleaner says the licence key is not valid. In general, a small typing error is behind this message. Copy and paste the key instead of typing it. CCleaner keys do not contain the digit 1. If you typed a one, try the capital letter I.

"Failed to save registration key file". CCleaner may be running without the right permissions. Right-click the CCleaner icon, select Run as Administrator and enter the details again.

The licence has expired. CCleaner does not accept the key of an expired licence. Check the term in the product name of your order.

You use a key for another platform. A key for CCleaner Professional on Windows does not work on a Mac, and the reverse is also true. Use the key on a Windows PC.

The product still shows as free after registration. Open Options > License Key, check the licence information, and enter the key again if it is missing.

Still stuck? Contact our support and include your order number and the exact message you see.