I deinstalled silverlight under Win7. But CCleaner shows under "Apllications" still "Microsoft Silverlight". I think I have to delete some keys in the registry. But what are the names?
Just look under both HKEY_LOCAL_USER & HKEY_LOCAL_MACHINE & go to: Software/Microsoft/Silverlight
The entry for Silverlight is:
[Microsoft Silverlight] ID=2169 LangSecRef=3023 DetectFile=%LocalAppData%\Microsoft\Silverlight\is DetectFile2=%LocalLowAppData%\Microsoft\Silverlight\is Detect=HKLM\Software\Microsoft\Silverlight Default=True FileKey1=%LocalAppData%\Microsoft\Silverlight\is|*.*|RECURSE FileKey2=%LocalLowAppData%\Microsoft\Silverlight\is|*.*|RECURSE ExcludeKey1=FILE|%LocalAppData%\Microsoft\Silverlight\is\*\|disabled.dat ExcludeKey2=FILE|%LocalLowAppData%\Microsoft\Silverlight\is\*\|disabled.dat
So you should deleted HKLM\Software\Microsoft\Silverlight from your registry. Though be careful while editing the registry.
HKLM = HKEY_LOCAL_MACHINE
Also check if the DetectFile folders still exists and remove those also.