Bad Electricity?

I was scared half to death this morning when my soundcard appeared to be dead. Winamp complained about damaged sound drivers, but a reinstall didn’t help. Then I noticed my MSI Mega PC display was showing all these random characters. Everything was solved by removing the power cable for a while, but I’m a little worried something’s not as it should be in there. I’m a complete beginner when it comes to hardware. Is it naive to blame bad electricity? :P