I tried another cleaning program once and it cleaned some files called report.wer. I don't know where they are on the computer and I don't know how to search for them but they are apparently unnecessary.
And another thing, in the registry on windows 7 I found some links to some exe files on the desktop which was deleted long time ago but still was written in the registry.
As Mike stated these are error reports, Ccleaner does clean these by default (without aid of WinApp2.ini) under the Windows Tabs in the System Group (Windows Error Reporting)