The average home user's PCs carries nearly 30 'spyware' programs secretly forwarding information about a user's online activities to others without their knowledge. You can read the full story at VNUNet
or BBC News
. The story also hit Slashdot
, where you can see people comments about it.
If you want to check your machine for spyware and remove it, try the following tools
Spybot - Search & Destroy