Before you sell a PC: the order that leaves nothing behind
Reset is not the same as erase, and one of the options leaves your files recoverable. What to do in which order.
Resetting a PC is easy. Doing it in the wrong order leaves software licensed to a machine you no longer own, an account still signed in, or files that are recoverable with ordinary tools.
The order, and why each step is where it is
- Back up. Everything after this is irreversible. Copy to an external drive and open a file from the copy to check it.
- Sign out of accounts. Your Microsoft account, OneDrive, browsers, password managers and anything with a device limit.
- Deauthorise licensed software. Adobe, Office and most professional tools count machines. Once wiped, there is nothing left to deauthorise from.
- Remove the PC from your Microsoft account online, so it stops appearing in your device list.
- Then reset.
The reset option that matters
Settings, System, Recovery, Reset this PC. Choose Remove everything, then in the additional settings choose to clean the drive rather than just removing files. The difference is real:
| Option | What it does | Recoverable? |
|---|---|---|
| Just remove my files | Deletes the file table entries | Yes, with ordinary tools |
| Clean the drive | Writes over the data | No, in practice |
The cleaning option takes hours rather than minutes, and it is the one to choose for a machine leaving your hands.
If the drive is encrypted
With BitLocker on, the data is already unreadable without the key, and a reset that discards the key is sufficient. Check its state first, because on many consumer machines device encryption is on by default without anyone enabling it:
manage-bde -statusSecondary drives are not included
Reset this PC covers the Windows drive. A second internal drive or a data partition is left alone entirely, which is the most common way personal files leave with a sold machine. Erase those separately in Disk Management.
What to leave
The recovery partition, so the new owner can reset again. Manufacturer drivers, which save them a download. And Windows itself, activated, which on a machine with a digital licence reactivates automatically for the new owner.
Common questions
How do I wipe a Windows PC before selling it?
Back up, sign out of your accounts, deauthorise licensed software, then Settings, System, Recovery, Reset this PC, choosing Remove everything and the option to clean the drive.
What is the difference between removing files and cleaning the drive?
Removing files deletes the file table entries and the data is recoverable with ordinary tools. Cleaning writes over the data and takes hours, and is the option to use for a machine you are selling.
Does resetting Windows erase my second drive?
No. Reset this PC covers the Windows drive only. A second internal drive or data partition has to be erased separately in Disk Management.
Do I need to wipe an encrypted drive?
With BitLocker on, the data is already unreadable without the key and a reset that discards it is sufficient. Check with manage-bde -status, since device encryption is on by default on many consumer machines.