Who do you call to exorcise software

Related:

• It's 10PM,
  Do you know where your software is?...
• Do You Know WHERE Your Software IS
  Today...
• What do you call a barber who cuts hair in a library?
  A barbarian!...
• What do you call a governess who farts?
  A hootenanny...
• Q: What do you call someone who speaks two languages?
  A: Bi-lingual. Q: What do you call someone who speaks...
• What do you call someone who buys a secondhand Lada?
  A scrap dealer...
• Q. What do you call a man with no arms and no legs who lies on your doorstep ?
  A. Matt...
• Q: What do you call a woman who has lost 95 % of her intelligence?
  A: A widow...