Somewhat along the lines Steve Wechsler is suggestion, I've got some more:
1) Have you made sure that your machine is up to date on critical patches,
via Windows Update or AutoUpdate. Your phrase "had some problems with our
computer that caused us to lose the program." makes me wonder whether this
would be worth checking. If this program was lost, other code may have
been, as well.
2) You shold do a complete scan of your machine--not just the intelligent
scan, after making certain you are on the current definition level. Go to
File, Check for updates, in Microsoft Antispyware. When that completes--it
should be very fast, check Help, About, and look at the Spyware Definition
Version--at this writing, it should be 5682.
Then click on Last Spyware Scan, or Tools, Spyware scan, run a scan now.
Choose Run a full system scan
If you have more than one drive, you may need to select the additional drive
using the select choice to the right of "scan selected drives/folders."
Let us know how that scan comes out.