Windows 10 first released to market in July 2015 is ending extended support. It officially ends on October 14th 2025. What do you need to do before that time and why is this happening? You can upgrade to Windows 11 before that time but Microsoft has enforced strict hardware requirements. The main security requirement is the mainboard must have a TPM 2.0 Module. This allows for a secure boot environment via encryption. Generally if you have an Intel Gen8 cpu ( late 2017) or later it will upgrade.
You can run the Windows PC health checker and it will advise you of compatibility. Exceed IT can assist with a full hardware / software audit of your organisation in readiness.