If you current PC has no support for Windows 11 due to lack of UEFI or lack of TPM 2.0 support, you need a new PC. But, here's some tips for you:
Tip No. 1: Don't buy an new PC yet.. Windows 10 has 3 more years of support!
If you not currently buying a PC, Windows 10 is ending of support on 2025, so it's 3 years!
Tip No. 2: If you currently buying a PC, think about the system requirements of Windows 11.
This is a good absolute idea so you can't waste your money buying unsupported hardware and stuff, you will regret in the end.
Tip No. 3: Also, Don't buy discrete TPM chip stuff, there's an shortage due to scalpers.
If you realize that TPM 2.0 is required, don't buy dTPM stuff, it is included in your CPU, or Motherboard.
Tip No. 4: If your buying an dTPM 2.0 chip, you need to understand what pinout your motherboard has.
The TPM 2.0 module has different pinouts on different motherboards so if you buyed an different TPM module that has different pinout than your motherboard, you're out of luck. More information about tips to buying an TPM chip here.
If you don't want to get rid your current PC but want to use 11 on the future, there's some threads here at Windows 11 Forum(s) about that.
www.elevenforum.com
Tip No. 1: Don't buy an new PC yet.. Windows 10 has 3 more years of support!
If you not currently buying a PC, Windows 10 is ending of support on 2025, so it's 3 years!
Tip No. 2: If you currently buying a PC, think about the system requirements of Windows 11.
This is a good absolute idea so you can't waste your money buying unsupported hardware and stuff, you will regret in the end.
Tip No. 3: Also, Don't buy discrete TPM chip stuff, there's an shortage due to scalpers.
If you realize that TPM 2.0 is required, don't buy dTPM stuff, it is included in your CPU, or Motherboard.
Tip No. 4: If your buying an dTPM 2.0 chip, you need to understand what pinout your motherboard has.
The TPM 2.0 module has different pinouts on different motherboards so if you buyed an different TPM module that has different pinout than your motherboard, you're out of luck. More information about tips to buying an TPM chip here.
If you don't want to get rid your current PC but want to use 11 on the future, there's some threads here at Windows 11 Forum(s) about that.

Let's install Windows 11 on incompatible hardware
Inspired on this thread: Let's run Win10 on really really old hardware - Windows 10 Help Forums Most of our machines are unsupported on Windows 11, why not force it? --------- Run Windows 11 on unsupported machines --------- 1. How to Bypass Windows 11's TPM, CPU and RAM Requirements 2...

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My Computers
System One System Two
-
- OS
- Windows 11 Home
- Computer type
- Laptop
- Manufacturer/Model
- Lenovo
- CPU
- Core i5-12450HX
- Memory
- 20GB DDR5-4800
- Graphics Card(s)
- iGPU + RTX 3050 Mobile (6GB)
- Sound Card
- Realtek
- Monitor(s) Displays
- the built-in laptop screen, and a generic monitor
- Screen Resolution
- 1080p * 2
- Hard Drives
- GIGABYTE NVMe SSD 256GB (GP-GSM2NE3256GNTD)
Micron NVMe SSD 512GB (MTFDKCD512QFM-1BDIAABLA)
- Browser
- Firefox
- Antivirus
- WD
-
- Operating System
- Windows 10 Pro
- Computer type
- PC/Desktop
- Manufacturer/Model
- Dell
- CPU
- Core i3-2100
- Memory
- 4GB DDR3-2133
- Graphics card(s)
- iGPU
- Screen Resolution
- 1080p
- Antivirus
- WD