Software does not stop on its end-of-support date. That is what makes the date dangerous: the machine works on Monday exactly as it did on Friday, and the only thing that has changed is invisible. From that day, every security flaw discovered is permanent.
What changes
- No security updates. New vulnerabilities are found monthly. On unsupported software they are never closed.
- No vendor support. When something breaks, there is nobody to call.
- Compliance and insurance. Questionnaires ask whether all systems are supported. Unsupported operating systems on the network can void coverage.
- Compatibility drift. Applications, printers and cloud services gradually stop working with it.
Why it sneaks up
The machine in the back office that runs one important thing. The server that "only does file sharing". The PC attached to a piece of equipment whose vendor says "don't touch it". These are exactly the systems that get missed — and exactly the ones we inventory when we take on an environment, with the end-of-support date for each written down.
Planning the move
Replacement, upgrade in place, or moving the workload to the cloud — the right choice depends on what the system does, and we lay the options out with dates and real costs well before the deadline. The goal is that end-of-support day is a line in a report that says "none remaining", not a surprise.
