1. Yesterday, after doing some computer maintenance that required a reboot, I started Spybot, and found that sixty-two items for Firefox, previously immunized, were no longer immunized. Ran Immunization successfully.

2. This morning, after a reboot required by an update to McAfee Virus Scan (program update, not a daily data file update), again there were sixty-two Firefox items that were no longer immunized. Successfully reimmunized same.

Why would this happen (if the answer is known, of course)?

3. A related question: Both times that I had to run Immunization to fix the Firefox entries, Spybot did that almost instantaneously. At that point, the Immunization screen showed that there were zero items not immunized. Why, then, does it take several minutes for Spybot to finish the immunization process if it is not immunizing anything?