PC problems

[Saphira]

Hi guys

Been having some problems with my PC

1) Freezing
2) Does not reboot when requested to, it just gets stuck in shutdown mode
3) When select shutdown it won't (have to shut it down from the tower)
4) Awful noise coming from speakers sometimes when it freezes

Now this is happening more often then not, twice a day some days
There is not much on my PC and have pretty much nothing running in the background.

any ideas on why this is happening would be greatly appreciated

Thanks
Saphira