It is quite possible to record in a room with a computer in. When noise is an issue I drape a blanket in front of, (not over!) my computer. I then record in the opposite corner of the room.

A "curtain" across the middle of the room attenuates the noise of my very noisy mac G4 further. Jeez it sounds like a hair dryer!

Even with a very high quality mike (Telefunken U47)and a first class pre amp, noise floors are fine.

If this doesn't work for you, just run your leads to an adjacent room and record in there.

If radio interference from your monitor is the problem
switch the monitor off after you press record.
OR
Undo your jack plugs, desolder the live lead, thread it through a ferrite bead. resolder it. BT use this solution in the telephone exchanges. They look like tiny polo mints and you can get them from electronics shops. They cost about 10p or less.

This cuts out all radio interference that the lead might pickup. It stops guitar leads from picking up taxi radios too.

Between April and Sept I regularly visit the Oswestry / Craven Arms / Llansantffraid-ym-Mechan area. And I've got a portable digital recorder. A 12 track akai thing..... um...... (thinks)

M of A (Ian)