That depends on the error. Sometimes it's hardware and you need a tech to fix it. Sometimes it's a wrong setting you can correct. Sometimes it's malware you must remove. Sometimes the system is so corrupted you need a clean install of the OS. And so on.
Kees
hello can anyone direct me to a good programme

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic