Hello Angela,
Your computer tech should have been able to clear the files in your Windows\TEMP directory. You can find the actual location of this file by launching CMD.EXE and typing:
and looking for the lines(s):
TEMP=C:\Users\ANDREW~1.STS\AppData\Local\Temp
TMP=C:\Users\ANDREW~1.STS\AppData\Local\Temp
You can go to each of those directories and delete (or perhaps move) all the files they contain. Be careful and make sure you are in the correct directory before doing this.
When Adagio is installed it creates a link to the sample data on your Start List. Look for
Start | All programs | Adagio | Adagio Payables Sample Data and let us know the results.