Removing Adobe Reader 7.0.5 -- NOT

I'm having a heck of a time removing Adobe Reader 7.0.5 from my Windows XP. In other words, I CAN'T remove it. In the Add/Remove Programs section, it gives me the message "The installation source for this product is not available. Verify that the source exists and that you can access it." I was hoping that installing the 7.0.9 version over it would do the trick, but the new version will not install as long as the 7.0.5 is still there. Any insights?

 

I neglected to mention that I could not remove it in safe mode either. I had tried WI cleaner before, but on a whim, I downloaded the most current WI cleaner over the old one. That did the trick! Adobe 7.0.5 is now history. Thanks!