Reset vs clean install: which one to use

Both get called "reinstalling Windows", but they leave different things behind. Depending on the situation, one is done in half an hour and the other needs a USB stick first.

Last updated 2026-09-21

The three ways

There are three ways to start Windows over. The names get used interchangeably, but they do different things.

Reset this PC (Settings → System → Recovery)

Reinstalls Windows from inside Windows, no USB needed. You choose "Keep my files" or "Remove everything", and whether to fetch the install files fresh ("Cloud download") or rebuild from what is already on the disk ("Local reinstall"). Either way, every program you installed yourself is removed. On a branded PC or laptop, the drivers and programs the manufacturer shipped come back.

Clean install (from a Windows install USB)

Boot from the install USB, delete the partitions and install from scratch. This is what people usually mean by "formatting". Nothing survives — not the manufacturer’s programs, not yours, not your settings. Drivers come back through Windows Update and the vendor’s site.

Manufacturer recovery (recovery partition or media)

Only on branded PCs and laptops. Returns the machine to the state it left the factory in, including all the manufacturer’s bundled software. Useful only when you specifically want "as it was when I bought it". Reached with a vendor-specific key at boot (Samsung F4, LG F11, HP F11, Dell F12, and so on).

What survives and what is wiped

Check this before you choose. Pick wrongly and something you expected to keep is gone, or something you meant to erase is still there.

Your files (documents, photos, desktop)

Reset with "Keep my files" keeps them. Reset with "Remove everything" and a clean install delete them. Note that "keeps them" means the user folders on the C drive — anything stored inside a program (game saves, mail, browser profiles) can go with the program.

Programs

All three remove them. Choosing "Keep my files" does not keep programs. When a reset finishes, an HTML file listing the removed apps appears on the desktop — handy when reinstalling.

Drivers

A reset generally restores the drivers the manufacturer shipped. A clean install detects everything from scratch. On a self-built PC a reset also removes drivers you installed yourself, so you end up downloading them again either way.

Other drives, such as D:

Reset with "Remove everything" asks partway through whether to wipe "Only the drive where Windows is installed" or "All drives". Pick the second and D: goes too. A clean install has you pick partitions yourself in the installer, so untouched partitions stay — which also means one wrong click there cannot be undone.

Windows activation

Survives all three. Activation is tied to this machine’s hardware record, not to a product key, so installing the same edition on the same PC reactivates as soon as it is online.

Corruption and malware

A reset rebuilds from the existing installation, so if system files are damaged the reset itself can fail or carry the problem over. "Cloud download" fetches fresh files and is better. A clean install is the certain option.

Which one, by situation

1. 1

   It has got slow and you want a tidy-up → Reset (Keep my files)

   No USB to make, and it is done in thirty minutes to an hour. Files stay, programs go, so reinstalling programs is the whole clean-up. If you have never done this before, this is the lower-stress option.

2. 2

   You suspect malware, or unexplained errors keep coming back → Clean install

   A reset uses the problematic installation as its raw material. If the goal is to get rid of a problem you cannot pin down, leave none of the material behind. It needs a USB stick, but it is certain.

3. 3

   Selling or passing the PC on → Reset (Remove everything + Clean the drive)

   Choosing "Remove everything" offers a "Clean the drive" option. It overwrites the freed space so recovery tools cannot bring files back. It takes hours, but for a machine leaving your hands this is the one to turn on. The quick format in a clean install only clears the index, which is not enough here.

4. 4

   You swapped the SSD or the motherboard → Clean install

   A reset only works on top of an existing Windows installation. A new disk has no Windows to reset, so the USB route is the only one.

5. 5

   It will not boot → Reset from the recovery environment, else clean install

   After two or three failed boots Windows drops into its recovery environment, and "Reset this PC" is available there too. If even that fails, boot from the install USB and clean install — but get your data off first, by attaching the disk to another PC or copying from a USB boot environment.

6. 6

   You want to move from Windows 10 to 11 → Clean install recommended

   The in-place upgrade in Settings works, but if you were going to start fresh anyway, a clean install from an 11 USB is cleaner. Your 10 licence activates 11 as-is.

Before either one

• Check whether BitLocker (device encryption) is on and that you can see the recovery key in your Microsoft account. A D: drive that turns up locked after a reset starts here.
• Sign in with a Microsoft account beforehand so activation and some settings follow you.
• "Cloud download" pulls more than 4 GB. On a slow connection "Local reinstall" is faster; if you suspect corrupt system files, the slower cloud option is the right one.
• Keep a laptop plugged in throughout. Losing power midway can leave it unbootable.

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