A lost laptop should be an inconvenience, not a reportable data breach. Knowing how to encrypt company laptops means putting a practical safeguard around the information staff carry between the office, home, client sites and schools. If the device is switched off and falls into the wrong hands, full-disk encryption makes the data unreadable without the correct credentials or recovery key.
For most organisations, encryption is no longer a specialist project reserved for large enterprises. Windows and Apple devices include capable encryption tools, but turning them on is only one part of the job. The real value comes from choosing the right method, protecting recovery keys and making sure the policy works for the people using the laptops.
What laptop encryption protects – and what it does not
Full-disk encryption protects data stored on a laptop when it is powered off, asleep or otherwise not signed in. The drive is encrypted in the background, so documents, browser data, saved passwords and locally stored emails cannot simply be read by removing the drive or starting the laptop from another device.
This matters when a laptop is lost on a train, stolen from a car or misplaced during a site visit. It also supports good data protection practice, particularly where devices hold personal information, financial records, pupil data, commercial documents or access to cloud services.
Encryption is not a substitute for wider cyber security. Once a user has signed in, malware or an unauthorised person with access to their account may still be able to view data. A well-protected laptop also needs strong passwords, multi-factor authentication, timely updates, endpoint protection and sensible user permissions. Think of encryption as a vital layer, rather than the whole security plan.
How to encrypt company laptops: start with a clear policy
Before enabling encryption, decide which devices and users the policy covers. In most businesses, the answer should be every company-owned laptop, including devices used by directors, remote staff and temporary workers. Schools may also need a clear distinction between staff devices, shared devices and laptops issued to pupils.
Your policy should explain that encryption is mandatory, who can authorise an exception and where recovery keys are stored. It should also set expectations for staff: laptops must be locked when unattended, reported promptly if lost, and returned when someone leaves the organisation.
A short policy is often more effective than a lengthy document nobody reads. The key is that it reflects how your organisation operates. For example, a small Hampshire business with a handful of remote workers may need a straightforward cloud-managed approach, while a larger organisation with specialist software or strict compliance requirements may require more detailed controls.
Before deployment, check four practical points:
- The laptop has a supported operating system and enough free disk space.
- Important files are backed up, ideally to an approved cloud service and a managed backup solution.
- Each device has an identifiable owner and is enrolled in your device management platform where possible.
- Recovery keys can be stored centrally and accessed only by authorised IT staff.
Choose the right encryption tool for your devices
For most Windows business laptops, BitLocker is the natural choice. It is built into supported editions of Windows Pro, Enterprise and Education, and uses the laptop’s Trusted Platform Module, or TPM, to protect the encryption key. When correctly configured, the user experiences little difference in day-to-day use.
BitLocker can require a PIN before Windows starts, which adds protection for higher-risk roles or laptops containing sensitive data. The trade-off is convenience. Staff need to remember another credential, and support teams need a clear process for helping users who enter it incorrectly. For many small and mid-sized organisations, TPM-based BitLocker with a strong Windows sign-in and multi-factor authentication provides a proportionate balance.
For Apple MacBooks, FileVault provides full-disk encryption. FileVault should normally be enabled through a business device management system, so the organisation retains a recovery key rather than relying solely on an individual employee. This is particularly important when a member of staff leaves or cannot remember their password.
Linux laptops can also be encrypted using tools such as LUKS, although setup and support should be planned carefully. Mixed-device organisations should avoid treating every platform as an afterthought. The standard should be consistent even where the technology differs: every portable device containing business data must be encrypted, managed and recoverable.
Be cautious with Windows Home devices. They may offer device encryption on compatible hardware, but they do not provide the same business management features as Windows Pro. If a laptop is used for company work, upgrading to an appropriate business edition is usually the more manageable option.
Configure recovery without creating a security gap
Recovery keys are the part of encryption that organisations most often overlook. A BitLocker recovery key may be needed after a hardware change, firmware update, security setting change or repeated failed sign-in attempt. FileVault has similar recovery requirements.
If the only copy of that key is stored in an employee’s email account, written in a notebook or saved on the encrypted laptop itself, the organisation has created an avoidable problem. The device may be secure, but the data could be permanently inaccessible.
Store recovery keys centrally in an approved business system, with access restricted to the IT team or nominated administrators. Microsoft 365 environments can commonly store BitLocker recovery information through device management and identity services. Apple management platforms can escrow FileVault keys in the same way. The exact route depends on your licences and setup, but the principle does not: recovery must be controlled, auditable and available when needed.
Do not share recovery keys freely over email or instant messaging. When a user needs help, verify their identity and record why the key was accessed. This protects both the organisation and the employee.
Deploy encryption in a controlled way
Avoid switching on encryption across every device without testing. Start with a small pilot group representing different laptop models, job roles and locations. Confirm that the devices encrypt successfully, restart normally, receive updates and can be recovered by the support team.
Once the pilot is complete, use your management platform to apply encryption settings consistently. For Windows devices, this may include enabling BitLocker, requiring compatible encryption strength, backing up recovery keys and reporting whether protection is active. For Macs, it may include enabling FileVault and confirming that the organisational recovery key has been escrowed.
Encryption usually runs in the background, but large drives and older laptops can take time. Encourage users to leave their devices powered on and connected to mains power during the initial process. Plan the rollout around busy periods, travel and critical deadlines, rather than creating disruption on a Monday morning.
It is also sensible to prepare a plain-English message for staff. Explain what will happen, whether they will notice any changes, what to do if they see a recovery screen and who to contact. Clear communication reduces unnecessary support calls and reassures people that the change protects their work as well as the organisation.
Verify, monitor and keep the standard in place
A green tick during rollout is not the end of the task. New laptops, replacement devices and machines rebuilt after a fault can fall outside the original deployment. Review encryption status regularly through your management tools and investigate devices that are not reporting correctly.
Your offboarding process should include recovering the laptop, confirming it remains encrypted, removing business access and securely wiping it before reuse or disposal. Encryption makes a lost device far less risky, but it does not remove the need for a remote wipe capability or a properly managed asset register.
Periodically test the recovery process with a spare device or controlled scenario. This is a useful check that keys are available, authorised staff know the process and documentation is accurate. A recovery process that has never been tested can become an operational problem at exactly the wrong time.
For organisations without an internal IT team, managed support can take the pressure out of this work. Elmdale IT Services can help assess existing laptops, configure suitable encryption and device management, and build the process around the way your team works. The aim is not to add complexity. It is to ensure that a missing laptop does not become a serious security incident.
The best approach is one your organisation can maintain: encryption enabled by default, recovery keys protected, staff informed and every new device brought under the same standard from day one.