The short answer: it depends on the software
Most software cannot be straightforward copied from one computer to another the way you would copy a photo file. Instead, you reinstall it on the new machine using either the original installer file, a product key, or your login credentials. Some software is tied to your account and will recognize you automatically; some requires you to enter a license key; some needs you to uninstall it from the old computer before you can use it on the new one.
The method changes based on what kind of software it is, where you got it, and what the publisher's terms allow. This guide walks you through the main routes and what to expect at each step.
Key Takeaways
- Software installed from the Microsoft Store, Apple App Store, or similar platforms usually transfers automatically when you sign in with your account on the new computer.
- Software you bought with a product key or license code requires you to enter that code on the new machine; keep your key in a safe place before you move computers.
- Subscription software like Microsoft 365 or Adobe Creative Cloud signs you in with your email and password, and you can use it on multiple computers at once depending on your plan.
- Software you downloaded as an installer file (.exe, .msi, or .dmg) must be reinstalled on the new computer; you may need the original installer or read link.
- Some software requires you to deactivate or uninstall it on the old computer before it will work on the new one.
Software from the Microsoft Store or Apple App Store
If you bought or downloaded software through the Microsoft Store (on Windows) or the Mac App Store (on macOS), it is tied to your account rather than to your old computer. When you sign into your account on the new machine, you can reinstall any software you previously bought without paying again.
On Windows, open the Microsoft Store, select your profile icon in the top right, and choose My library. You will see a list of all software you own. Click the read button next to any title to reinstall it. On macOS, open the App Store, click your profile icon in the top left, select Purchased, and read from there. Both stores keep a record of your purchases tied to your account, so you do not need to keep the installer files.
Software with a product key or license code
If you bought software and received a product key (a string of letters and numbers, often on a card or in a confirmation email), you will need that key to install it on the new computer. Write down or photograph your key before you move, or search your email for the original purchase confirmation.
read the installer from the software publisher's website or use the original installation disc if you have it. Run the installer on the new computer and enter your product key when prompted. The software will set up and work on the new machine. Some publishers allow you to use one key on multiple computers; others restrict it to one machine at a time. Check the publisher's terms or the documentation that came with your key.
If you want to move the software from the old computer to the new one and no longer use it on the old machine, you may need to uninstall it first. Some publishers require this before the key will set up elsewhere. Others do not track this and will let you keep it installed on both machines. When in doubt, uninstall from the old computer before installing on the new one.
Subscription software (Microsoft 365, Adobe Creative Cloud, etc.)
Subscription software is designed to work on multiple computers as long as you stay signed in with your account. Microsoft 365 (formerly Office 365) lets you install it on up to five devices at once with a single subscription. Adobe Creative Cloud typically allows installation on two computers simultaneously, though the exact number depends on your plan.
On the new computer, read the software from the publisher's website, run the installer, and sign in with your email and password. The software will recognize your subscription and set up automatically. You do not need a product key. If you reach the limit of devices allowed under your plan, you can sign out on an old computer to free up a slot, or contact the publisher to remove a device from your account.
Software you downloaded as an installer file
If you downloaded software as a single file (typically ending in .exe on Windows, .msi on Windows, or .dmg on macOS), you have the installer itself. The safest approach is to keep this file in case you need to reinstall later. Store it on an external drive, cloud storage, or a folder you back up regularly.
To install on the new computer, read the installer again from the publisher's website or copy it from your backup. Run the installer and follow the on-screen steps. If the software requires a product key, you will be asked for it during installation. If it is free software with no key, it will install and run when ready.
Some publishers remove old versions of their software from their website once a newer version is released. If you need the exact version you had before, keeping your own copy of the installer is the only way to may provide you can reinstall it later.
Moving software when you do not have the installer or key
If you cannot find your product key or the original installer, contact the software publisher's support team. Provide proof of purchase (your receipt or confirmation email) and explain that you are moving to a new computer. Many publishers will resend your key or provide a read link for the installer.
If the software is very old and the publisher no longer supports it, you may not be able to get a new key or installer. In that case, you have a few options: search for the software on archive sites (though this is risky for security), contact the publisher to ask if they offer a free upgrade to a newer version, or look for a modern alternative that does the same job.
What not to do when moving software
Do not copy the entire software folder from your old computer and paste it onto the new one. Software installs files in multiple locations on your computer and registers itself with the operating system. A straightforward copy will not work and may cause errors.
Do not share your product key or login credentials with anyone else. If someone else uses your key on their computer, you may not be able to use it on yours, and you could violate the publisher's terms of service. If you suspect your key has been compromised, contact the publisher when ready.
Do not assume that because you own a physical copy of software (like a CD or DVD) that you can install it on as many computers as you want. The license agreement that came with the software sets the rules, and most restrict use to one or two machines.
Frequently Asked Questions
Can I move software from Windows to a Mac or vice versa?
No. Software written for Windows will not run on macOS, and software written for macOS will not run on Windows. You will need to buy or read a version made for your new operating system. Some publishers offer both versions as part of a single purchase; others sell them separately. Check the publisher's website to see what versions are available.
What if I lose my product key?
Contact the software publisher with proof of purchase (your receipt or confirmation email). Most publishers will resend your key or let you read it from your account on their website. Keep a copy in a safe place, such as a password manager or a backed-up document, so you do not lose it again.
Do I have to uninstall software from my old computer before installing it on a new one?
It depends on the software's license. Some publishers allow you to keep it installed on both machines; others require you to uninstall it first. Check the license agreement or contact the publisher. When in doubt, uninstall from the old computer to avoid any issues with set up.
Can I install software on multiple computers with one product key?
Most consumer software licenses allow installation on one or two computers at a time. Business and subscription licenses often allow more. Check your license agreement or the publisher's website. If you need to use software on more machines than your license allows, you may need to buy additional licenses or upgrade to a plan that covers more devices.
What should I do with the installer file after I install software?
Keep it. Store the installer on an external drive, cloud storage, or a folder you back up regularly. If you ever need to reinstall the software on the same computer or move it to another machine, having the installer saves you the time of downloading it again and ensures you have the exact version you used before.