I'm new to the whole guitar-scene, and hopefully this is some minor problem. I've got a Fender Squier Strat, Venom Leads and a Fender G-Dec amp, but I keep getting really loud amp buzz, which varies depending on the amp settings. Can anybody help me?

Ibanez S470 (EMG 81/S/85)
Sigma DMC-15E
Laney VH100R
Laney 4x12 Cab
Ibanez Weeping Demon
M-Audio ProKeys 88
Mbox 3 Pro
KRK RP6 G2's
Plum Team FTW!

strat = single coil pickups
single coil pickups = noise

turn your volume on the guitar down a tad and take your gain down a bit
also operating near electrical equipment ie. the computer will interfere. (anyone care to back that up? im not quite sure on that lol)
Okay. This may help. On ALL settings you have trouble with, press "AMP". Go down to "NOISE GATE" and select "SUPER". That gets rid of all of my problems.
"Look, ma! I can play Van Halen's Eruption!" said the five year old child, who proceeded to press random frets as fast as his tiny little fingers would allow.