An EICR is essentially a health check on the electrics, and involves dismantling some of the installation (sockets, lights, fusebox, etc) to ascertain the condition and safety, and its suitability for continued use. For more information, check out our blog titled: What does an electrician do on an EICR?
The only real way of telling whether your electrics are completely safe is by having a thorough health check on the electrics (EICR) carried out by an experienced electrician. We specialise in these - please find out more here.