beep when I turn on my pc

once I could get to maintain it on with out freezing it works good, but that is after like two hours I have to be fighting with it.

How does it start up in safe mode ??

(re-boot and tap F8 as its booting then select 'Safe mode' with the arrow keys

i start it normal, reddevilggg i'm sleepy i'll.leave this for after I wake up thank you hope to comunicate with you later THANK YOU. It's that i'm sleepy, .  the re-boot part i'll do it when I wake up, then wait for your instruccions thank you see you later.

Get some sleep.......

hi i'm back, I turned on my computer in safe mode ran sfc /scannow restart it and the same thing.

well the second time I did it I enter in safe mode with network,  I ran the sfc /scannow and after a while I ran some cleaning stuff, and when I restart the pc a black screen came out checking the disks, it took about 5 steps and .... it's working. Thankyou reddevilggg, your the best. But a would like to know what it was? Anyway thank you again.