Contribution d'origine par : Davis ,
If your PC is making an odd noise and the fan is running constantly it could be something using up a lot of you CPU. I would check what processes are running in the background and close any non essential programs also check your startup programs (Task manager>startup tab). As you now have windows 10 I would remove any anti-virus software and activate windows defender. This should free up the CPU usage and stop it from lagging. Hope it works.