Windows 11 Windows from scratch - which method is “better”?

[Mihtechweb]

Hello, everyone!
I am interested in the following: what is the difference between clean reinstallation of Windows from a flash drive (with full formatting of all partitions) and Recovery option, for example, from the cloud with the deletion of all data (“Factory reset”)? There's information about this online, but not much specifics. I am particularly interested in the amount of disk space occupied by the system after updating to the current version in both cases; the resulting performance (speed) of the system; and whether viruses, broken links/orphaned files or other unnecessary information (Windows.old folder) from the previous state are transferred to the new Windows when resetting? What other actual differences might there be when installing the system “from scratch” (with the original external drive or without it)?

 

[Mihtechweb]

Before running any “experimental optimizer”:

1. Create a restore point

As far as I know, rolling back to a restore point is not always possible.

Since you explicitly said you already understand the “lite ISO” situation: the closest legit equivalent is LTSC, but it’s licensing‑specific and not for everyone.

What are the limitations for it (LTSC) if you use an unactivated version?

some privacy tweaks can hurt Store/Update functionality.

Install apps from official sources (Microsoft Store, vendor’s official site, or trusted package managers like winget).

 

[ChatGPT]

You’re correct on all three points you’re hinting at.

1) “Create a restore point” — yes, restore isn’t guaranteed​

System Restore is helpful but not a real backup. Restores can fail or be unavailable for several reasons (corruption, VSS issues, insufficient shadow storage, system file problems, BitLocker/boot changes, etc.. So I treat a restore point as a nice-to-have rollback, not the safety net.
Better safety net before running “optimizers/tweaks”:

• Make a full system image backup (so you can restore even if Windows won’t boot).
• Then (optionally) also create a restore point because it’s quick.

If you want the simplest “I can always go back” method, imaging is the one.

---

2) LTSC “limitations if unactivated”​

This is the key point: LTSC is not like Pro/Home where people sometimes run it indefinitely “not activated.”
In practice you have two legitimate scenarios:

A) Evaluation LTSC (time-limited)​

Microsoft’s Evaluation Center offers Windows 11 Enterprise LTSC 2024 as a 90‑day evaluation.
Microsoft also explicitly warns that if you fail to activate the evaluation after installation, or if the evaluation period expires, you’ll get:

• black desktop background
• persistent “not genuine” notification
• PC shuts down every hour

So the evaluation is not suitable for ongoing use.

B) Properly licensed/activated LTSC (intended use)​

Enterprise LTSC is meant to be activated via enterprise mechanisms such as KMS or MAK (or AD-based activation).
Bottom line: there isn’t a “comfortable” unactivated LTSC mode I can recommend. If you want LTSC long-term, you need the right license/activation path. (I also can’t help with bypassing activation.

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3) “Privacy tweaks can hurt Store/Update functionality” + winget/official sources​

Also correct. Two concrete examples:

A) winget uses multiple sources (including Microsoft Store)​

By default, WinGet has sources including:

• msstore (Microsoft Store catalog)
• winget (WinGet Community Repository)
• winget-font

If you apply privacy tweaks that break Microsoft Store, or block Store endpoints, or remove Store components, then WinGet operations that query sources can start failing (often because msstore can’t be reached).
Good practice if you “de-Store” a system:

• Use WinGet with an explicit source, e.g. --source winget, so it doesn’t try msstore.
• Or manage sources with winget source (list/remove/reset/export).

B) Some “privacy/optimizer” scripts disable core services​

A lot of “debloat/privacy” scripts do things like disable BITS, Windows Update services, Delivery Optimization, Store install services, etc. That can break:

• Microsoft Store installs/updates
• Windows Update reliability
• winget (especially Store-backed installs)

---

If you tell me which direction you’re leaning:
1) Stay on Windows 11 Pro 25H2 but “lean it out” (recommended for most home users), or
2) Try LTSC evaluation for 90 days, or
3) Pursue properly licensed LTSC/IoT LTSC (enterprise-style)
…I can give you a “minimal risk” plan for that path (and which categories of tweaks to avoid so you don’t lose Store/Update/Defender).

 

[Mihtechweb]

If you tell me which direction you’re leaning:

I need to think about it .

 

[ChatGPT]

No problem at all — this is one of those topics where it’s easy to overthink, because the “best” choice depends on your tolerance for maintenance, licensing constraints, and how much you want Windows to stay “stock.”
If it helps, here’s a simple decision shortcut you can come back to later:

Quick decision shortcut (pick the first that matches your situation)​

1) “I want maximum certainty + least headache”​

Stay on your current Windows 11 Pro, do a USB clean install (delete all partitions on Disk 0 during Setup), then keep it lean with only built‑in options (Storage Sense, uninstall bloat, startup apps).
This is the most predictable and least risky path for a “mystery disk usage” problem.

2) “I want Windows to change less over time”​

Consider LTSC only if you have (or can get) proper licensing/activation. LTSC evaluation isn’t a good long‑term solution (it’s time‑limited and becomes unusable after expiry, as discussed earlier).

3) “I want to apply tweaks from GitHub optimizers”​

That can work, but do it after the clean install and in small batches (and preferably with an image backup available). Some tweaks can break Store/Update/winget behavior, so it’s best as a “phase 2,” not the foundation.

---

One “minimal work” next step (when you feel like it)​

When you’re ready, tell me just this (one line is enough):
What matters more to you: disk space, boot speed, or privacy?
Then I’ll propose a very short recommended path (with the few safest tweaks only), rather than a long checklist.
Take your time.

 

[datawizard0103]

Hello, everyone!
I am interested in the following: what is the difference between clean reinstallation of Windows from a flash drive (with full formatting of all partitions) and Recovery option, for example, from the cloud with the deletion of all data (“Factory reset”)? There's information about this online, but not much specifics. I am particularly interested in the amount of disk space occupied by the system after updating to the current version in both cases; the resulting performance (speed) of the system; and whether viruses, broken links/orphaned files or other unnecessary information (Windows.old folder) from the previous state are transferred to the new Windows when resetting? What other actual differences might there be when installing the system “from scratch” (with the original external drive or without it)?

A cloud or factory reset often preserves OEM provisioning like custom drivers, firmware helpers, device certificates, and sometimes vendor services tied to the motherboard. A true clean install from a USB wipes all that and lets Windows rebuild drivers, network components, and system certificates from scratch. Disk usage after updates ends up nearly the same, and performance is effectively identical once indexing settles, but a clean install is more likely to eliminate odd authentication, networking, or app-to-service issues because nothing proprietary is carried over. That’s why if a banking app or secure website behaves oddly after a reset but works on another machine, a full clean install helps confirm whether it’s truly Windows-side or something on the bank’s platform.

 

[datawizard0103]

Hello, everyone!
I am interested in the following: what is the difference between clean reinstallation of Windows from a flash drive (with full formatting of all partitions) and Recovery option, for example, from the cloud with the deletion of all data (“Factory reset”)? There's information about this online, but not much specifics. I am particularly interested in the amount of disk space occupied by the system after updating to the current version in both cases; the resulting performance (speed) of the system; and whether viruses, broken links/orphaned files or other unnecessary information (Windows.old folder) from the previous state are transferred to the new Windows when resetting? What other actual differences might there be when installing the system “from scratch” (with the original external drive or without it)?

One real difference people miss is licensing and firmware level stuff. A factory reset keeps your existing activation tied to the motherboard and quietly reuses OEM drivers and vendor tweaks that live outside the main Windows files. A clean install from a USB pulls only Microsoft’s base drivers at first and relies on Windows Update later so things like touchpads audio hotkeys or power tuning can feel off until drivers load. Activation still works automatically once you’re online but the reset path is smoother because it already knows your hardware. This doesn’t affect disk space much but it can affect first-day stability and battery behavior which is why clean installs sometimes feel rough until everything finishes updating.

 

[ussnorway]

the difference is a Factory reset doesn't wipe the drive and you can keep files where as a fresh install [with format] will lose all data

with oem systems like yours a factory reset is the safer option because there could be 3rd party parts that need drivers Microsoft doesn't have like a sound or network card

space wise, yes a fresh install leaves you more but thats more extreme

 

[ChatGPT]

You’ve basically got the right framing — it just needs a couple of precise distinctions so people don’t accidentally nuke data (or fail to wipe it when selling).

Factory reset vs fresh install (what actually happens)​

“Factory reset” (Reset this PC / OEM recovery)​

There are two common meanings:
1) Windows “Reset this PC”

• Keep my files: keeps user data under C:\Users\..., removes apps/drivers, reinstalls Windows. It does not wipe the whole disk.
• Remove everything: removes user data and apps.
  • If you choose “Clean the drive”, it does do a wipe-style overwrite (slower, intended for selling).
  • If you don’t select “clean”, it’s faster and more recoverable.

2) OEM “Factory Recovery” (Dell/HP/Lenovo recovery environment)

• Usually restores the OEM image + drivers + bundled apps (“bloat”), and often re-creates the factory partitions. Some OEM tools also offer wipe/secure erase options.

“Fresh install” (USB installer)​

Also comes in two flavours:

• Fresh install without formatting (Custom install, select the existing Windows partition, don’t delete/format):
  • Windows typically moves old system files into Windows.old and you may still be able to recover user files (not guaranteed, but often possible).
• Fresh install with delete/format:
  • Yes, that will destroy the current filesystem view and you should assume all data is lost unless you have backups.

Your point about OEM machines & drivers​

Agreed: OEM recovery is often the “safer/easier” first step on laptops because it restores the vendor’s driver set (Wi‑Fi especially). A clean install can still work fine, but you should pre-download chipset + network drivers from the OEM support page (or have them on a USB) in case Windows doesn’t have them at first boot.

Practical rule of thumb​

• Troubleshooting / stability: start with Reset this PC → Keep my files (after a backup).
• Selling/giving away: Remove everything + Clean the drive (or a proper wipe tool).
• Hardcore cleanup / maximum space / corruption persists: fresh install, but only after you’ve backed up and you’re ready to reinstall drivers/apps.

If you want, tell me the exact scenario (fixing a glitch vs preparing to sell), and I’ll give a 5–7 line “do this / click here” checklist you can paste into the tutorial thread.

 

[Mihtechweb]

with oem systems like yours a factory reset is the safer option because there could be 3rd party parts that need drivers Microsoft doesn't have like a sound or network card

space wise

Agreed: OEM recovery is often the “safer/easier” first step on laptops because it restores the vendor’s driver set (Wi‑Fi especially). A clean install can still work fine, but you should pre-download chipset + network drivers from the OEM support page (or have them on a USB) in case Windows doesn’t have them at first boot.

Some laptop, nettop, and mini PC manufacturers provide clean system images with pre-built drivers on their websites.

 

[ChatGPT]

Yes — that’s a very important nuance, and it can change the “factory reset vs clean install” recommendation.

What you’re describing is basically “best of both worlds”​

Some OEMs (especially mini‑PC/nettop vendors) publish one or more of these on their support pages:
1) A full recovery image (often restores the machine to “as shipped”, sometimes with OEM utilities/bloat).
2) A “clean” Windows image (OEM-provided ISO/USB image) that’s closer to Microsoft Windows, but already includes the correct drivers.
3) A driver pack (ZIP/EXE) to install after a normal Microsoft ISO install, or to load during Setup if networking/storage is missing.
When an OEM provides a clean image with drivers, it removes most of the risk that ussnorway was warning about (missing Wi‑Fi/audio/network drivers), while still giving you a predictable reinstall.

How it fits into the methods we discussed​

• A factory reset (OEM recovery) is often “safer/easier” because it tends to restore the vendor’s working driver set immediately.
• A clean install from Microsoft ISO/USB is still the most “surgical” / deterministic wipe, but the only real downside is: you might need to manually supply network/storage drivers at first boot or during Setup.
• Cloud download reset sits in between: convenient and can be cleaner than an OEM factory image, but it’s still a reset workflow with some caveats (Windows RE networking/driver availability can affect success, and OEM customizations/drivers may or may not be restored automatically).

So if your vendor provides a clean OS image with drivers, it can be a very strong option—especially for mini PCs.

Practical guidance (so you don’t end up stuck without Wi‑Fi)​

If you decide to reinstall again, here’s the simplest “safe” approach:
1) Check your mini‑PC vendor support page for:

• “Windows image / recovery image / factory image”
• “Driver pack / drivers all-in-one”
• “LAN/Wi‑Fi driver” (download at minimum)

2) Even if you use the OEM image, I still recommend keeping on a USB stick:

• Ethernet driver (Realtek/Intel)
• Wi‑Fi driver (Intel/Realtek)
• (Optional) chipset/graphics

That way, if Windows boots with no network, you’re still fine.
3) After install/reset: run Windows Update fully. Whether you reset or clean install, the “final” disk usage and performance are mostly influenced by updates and what you reinstall afterward.

One quick question (so I can tell you which route is best)​

Does your mini‑PC manufacturer provide:

• a full recovery image only, or
• a “clean Windows” image (sometimes explicitly called “Clean install image” / “Pure system” / “No bloat”), or
• just a driver pack?

If you tell me the manufacturer/model name (or paste the support page text), I can tell you which one you should trust for a “clean but fully working” reinstall.