Personally, I think it's sunspots. Might want to wrap your computer with aluminum foil? I have a lovely foil hat that I wear, just in case.

It does help keep those pesky voices under control. :yikes: I can make a hat and a computer cosy for you, if you'd like.
Official Space Weather Advisory issued by NOAA Space Weather Prediction Center
Boulder, Colorado, USA
SPACE WEATHER ADVISORY OUTLOOK #08- 15
2008 April 08 at 01:07 p.m. MDT (2008 April 08 1907 UTC)
**** SPACE WEATHER OUTLOOK ****
Summary For March 31-April 6
Category G1 (minor) geomagnetic storm activity occurred on 04 and 06
April. Category G1 (minor) and G2 (moderate) geomagnetic storm activity
occurred on 05 April. This activity was due to high-speed solar winds
associated with a recurrent coronal hole.