Windows 7 32 bit or 64 bit? What is the path of the TEMP folder? What are the names of the Parallels files that you see there?
In my Windows 7 64 bit, I have a PrlToolsPackages folder in the temp folder at C:\Users\Administrator\AppData\Local\Temp but it is only 67 MB.
The Parallels files at C:\Program Files (x86)\Parallels are only 19 MB.