How often do you check to see if you have spyware residing on your computer? I check once a month, and so far I’ve been pretty lucky — most of the spyware found is limited to tracking cookies we all pick up at various websites. But Earthlink, which has started a free scanning service called SpyAudit, says that the average PC user has 28 spyware items on his or her PC.

If you’re not using SpyBot or Ad-Aware to check for spyware, check out SpyAudit — like the others, it’s free.