Before you try booting with the recovery disc,try your F11 maybe F10 keys on startup.
Not sure about Evesham pc's but i would hope there is a recovery partition that is hidden,this should give 3 options.
1) Restore to factory settings (Destructive)
2) Recover without dataloss
You may have different options if indeed the recovery partition is there.
Shut down the pc and reboot tapping F11 (maybe a different key)
This should reload any preinstalled software.
This all assuming it has a recovery partition that is hidden.
Though you may have to update certain drivers.