Hi leo galan,
Welcome to Microsoft Q&A!
If your BIOS shows “No security device found”, it means TPM is either disabled, or unsupported by your CPU/motherboard. To better resolve this issue, I'd need you to first identify your hardware:
- Press Win + R > type
msinfo32> press Enter and check BaseBoard section - Confirm if your hardware supports TPM/fTPM from its official website or manual
- Or you can share the information here and I can help look into it
I'd also like to ask for your Windows version, as it will be easier for giving guidance later. In addition, if you're using Windows 11, it's confirmed your PC supports TPM 2.0 as it's one of the requirements.
However, if your CPU is old (as you have had this PC for some time), and/or Windows cannot upgrade to version 11, then TPM 2.0 may not be supported. In that case, your motherboard needs a physical TPM module, which means there's no software fix.
Let me know your hardware's brand and Windows version, I'll help check it if you need! We will work from there once confirmed that your device supports TPM 2.0.
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