Welcome Harry,
I understand how frustrating this can be, especially when several built-in Windows apps are affected at the same time.
Since Calculator, Snipping Tool, Windows Security, Media Player, and Microsoft Store are all having trouble opening, I’d first check whether this is affecting the Windows app components more generally.
Before proceeding, could you confirm:
- Did this start after a Windows update, BIOS/UEFI update, or any hardware/firmware change?
- When TPM becomes disabled, how are you confirming this: in the BIOS/UEFI, through “tpm.msc”, or somewhere else?
In the meantime, please try these steps:
- Open Settings > Windows Update, select Check for updates, install any available updates, and restart the PC
- Press Windows + R, enter
wsreset.exe, and select OK. A blank Command Prompt window may appear temporarily.After it closes, check whether Microsoft Store opens - For one affected app such as Calculator, open Settings > Apps > Installed apps > Calculator > Advanced options, then select Repair. If repairing it does not help, select Reset
For the TPM issue, press Windows + R, enter tpm.msc, and select OK. Please let me know exactly what appears under the TPM status and what is shown for “Specification Version”.
Looking forward to your update.