Drop-outs


I've just set up my first PC hifi rig. Not bad. I'm getting sporadic "drop-outs" (music cuts out for split seconds and comes back on its own). What is most likely cause?

-website
-DAC (I use USB-only Kingrex)
-PC
-something else

Ideas?
lindisfarne
exactly what is your computer, what software and how is it all set up????? dropouts can be symptoms of a hard drive on its' last legs but hard to diagnose with the limited info you have provided.
I have a "home-brew" PC with new operating system installed (Windows 7 Ultimate, I believe). I'm hopeless on the computer and know where to find nothing! I'm getting sporadic drop-outs on internet radio (Pandora, Wolfgang, Dead radio). I have not tried ripping CDs yet, so I cannot speak to this. Thanx for the help, folks.