When you fit a new SSD, you can clone the old drive onto it, so Windows, programs and files appear exactly as before, or you can do a fresh install of Windows and copy your files across. Cloning is faster and keeps everything, including old problems. A fresh install is cleaner and often better on a laptop that has been slow for years. Either way, back up first, check that the new SSD is at least as large as the data on the old drive, and keep the old drive untouched until the new one has booted and been checked.
An SSD upgrade is one of the changes that makes an old laptop feel new. The part that worries people is the software side: will Windows still start, will the licences work, and what happens to the files? This guide compares the two routes, walks through a clone step by step, and lists the problems that stop a cloned drive from booting.
Clone or fresh install: how to choose
| Factor | Clone | Fresh install |
|---|---|---|
| What you get | An exact copy of the old drive | A clean Windows, with your files copied back |
| Programs and settings | Kept as they are | Must be installed and set up again |
| Old problems | Copied too (junk, bad drivers, malware) | Left behind |
| Time and effort | Less hands-on work | More hands-on work |
| Best when | The laptop runs well and you only want speed and space | The laptop was slow, unstable or infected before the upgrade |
If the old system is healthy, clone. If it was already misbehaving, a fresh install is worth the extra work, because copying a problem to a faster drive just makes it appear faster. After a fresh install, the steps in our guide to moving data between laptops help with the files and programs.
Before you start
- Back up what matters to a separate drive or the cloud. A clone is a copy, but a slip with the wrong drive selected can erase the wrong one.
- Find out what type of SSD the laptop takes. It may be a 2.5-inch SATA drive, an M.2 SATA drive or an M.2 NVMe drive, and the slot decides. The model number helps: see how to find your laptop's model number and specs.
- Compare the sizes. The new SSD must hold at least the data used on the old drive, not the old drive's full size. Free up space or choose a larger SSD if it is close.
- Check for encryption. If BitLocker or device encryption is on, turn it off before cloning, which decrypts the drive and can take a while, and keep the recovery key.
- Plan the connection. A laptop has one drive bay in most cases, so you connect the new SSD through a USB enclosure or adapter to clone, then swap the drives.
- Shut down fully. Hold Shift while you click Shut down, or turn off Fast Startup, before you clone, so the drive is not left half-saved.
How a clone works
- Connect the new SSD through the USB enclosure or adapter. Check that Windows or the cloning tool sees it.
- Open the cloning software from the SSD maker or a trusted disk imaging tool, and choose disk clone. Select the old drive as the source and the new SSD as the destination. Read this screen twice: the destination is erased.
- If the tool offers it, keep the partitions, then extend the C: partition afterwards to use the extra space.
- Wait for the clone to finish. Large drives can take a long time.
- Shut down, disconnect the power and remove the battery if the laptop allows it. Open the laptop, take out the old drive and fit the new SSD in its place.
- Start the laptop. If it asks for the BIOS, check that the new drive is listed and is first in the boot order. Our guide to opening the BIOS or boot menu covers six brands.
If the clone does not boot
The laptop shows "No bootable device" or an operating system error. The most common causes:
- Wrong boot order. The BIOS still points at the old drive or at nothing. Select the new SSD.
- Boot mode mismatch. The old drive used UEFI with GPT, or legacy mode with MBR, and the setting does not match the clone.
- Missing or damaged boot partition. Some tools skip the small system partitions unless you select them.
- A drive the laptop does not detect. Reseat the SSD and check that it is the right type for the slot.
- Encryption. A cloned encrypted drive can ask for the recovery key.
Our guide to no bootable device and operating system not found walks through these checks. Because the old drive is untouched, you can put it back and try again.
After the clone
- Check that Windows is activated and that your programs open.
- Open "Defragment and Optimize Drives" and confirm the SSD is listed as a solid state drive. Windows handles trimming for you, and you should not defragment an SSD by hand.
- Check the free space and the drive's health in the maker's tool.
- Keep the old drive for a while as a backup, but do not start the laptop with both drives connected: a clone carries the same disk signature, and Windows may mark one disk offline. Wipe the old drive before you reuse it.
If you choose a fresh install
- Download the Windows installation media from Microsoft's site and put it on a USB stick, from another computer if this one will not start.
- From the laptop maker's support page, download the Wi-Fi or LAN driver for your exact model to a USB stick first, in case Windows cannot find the network after the install.
- Most laptops activate Windows by themselves once the same edition is installed and the laptop is online. Note the edition that came with it.
- Fit the new SSD, boot from the USB stick and install Windows onto the new SSD only. Leave the old drive out, or disconnected, until the install is done.
- Install the drivers and updates, then restore your files and programs from your backup.
Choosing the SSD
Match the type to the slot first, and size second. A very cheap unknown brand with no warranty is a poor choice for the drive that holds all your data, and the maker's warranty period and written endurance rating tell you more than the speed on the box. An NVMe drive will not work in a slot that only supports SATA, so match the type to the slot.
How we can help
We fit the drive, clone the old one or install Windows fresh, and check that it starts and runs. The laptop SSD upgrade page lists what is covered, and laptop OS installation covers a clean Windows install. If the old drive is failing, tell us before we start, because cloning a failing drive can stop part-way and may need recovery instead. Book by call or WhatsApp, and see laptop repair near me for your nearest branch.
Frequently asked questions
Can I clone a bigger hard drive onto a smaller SSD?
Yes, if the data used on the old drive fits on the SSD. The tool needs to be set to resize the partitions, and it may ask you to free up space first.
Will Windows stay activated after cloning to an SSD?
Usually yes on the same laptop, because the licence is tied to the hardware. Check the activation status after the first start.
Is a fresh install better than cloning?
If the old system was slow or unstable, a fresh install is usually better. If it ran well, cloning saves time.
Can I clone a drive that has bad sectors?
It may stop, or copy damaged files without warning. If the drive is failing, stop using it, make a backup of your important files first and ask for help.
