Computer is doing a few strnage things?

I am trying to fix a dell dimension 4600c for someone and i am finding it has more than one issue.I boot up and it has ide errors concerning the mouse and keyboard.

Then i press f1 to proceed with booting into winxp.

Then i notice the video is horrible.The screen flickers pink and yellow (virus?).

So then i loaded zonealarms security suite and cleaned out as much as i could but only to now notice i cant connect to the net to update the defintions.i tried to but as i was the pc shut off. o_0

It got mad at me and shut off.

I should be able to just plug in my dsl plug and it should just recognize my network like my nephews laptop does but it wont.

also, another weird thing is some noise it makes while it boots up..almost like something shorting out.sounds like the power supply.it makes a weird looping noise but almsot seems like it maybe something with the video card.i would say the hardrive but there is no clicking noise.this is a new noise..

Computer is doing a few strnage things?virus protection

Random BIOS Errors, erratic video and strange noises: this sounds like motherboard failure if you can answer one question-- does this behavior repeat each time you turn the PC on? If these are errors that have gone away and new symptoms each time, then your friend is not taking error messages as seriously as they should be and might need to talk to others more often if this is happening regularly.