My hp pavillion ze4805us is giving me a system error. i am trying to do a system restore from the disks can u help?

Insert the os disc in some cases systems come with a system recovery disc if this is not the case just insert what you have shutdow your system when your system boots press the del,f2,or whatever hotkey your system uses to enter the bios menu then while in bios go to boot devices or boot options and click start from cd and then press f10 to save and exit your system will ask yes no click yes then it should restart and a white text should appear saying boot from disc ? click any button when os finnally loads it will ask you to install or to repair ?click repair this searches your system finds out what it's lacking and reloads it .this should be it hope this helps good luck
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