The problem is that it seems like I cannot uninstall Java 7 Update 7 from Oracle. I went to my control panel, found it and wanted to delete it, however it always is abruptly aborted just when it is close to finished. So I opened the task manager and tried it again.
While uninstalling, a second msiexec.exe, following the same path as the first, is opened. At the end of the desinstallation however, most of the time a process named msi*****.tmp (the hexadecimals behind it vary from time to time I try to uninstall it) with the following description: FIU, is opened during that moment and quickly closes again. It doesn't seem to have any path. In a small percentage of cases, there is a third msiexec.exe opened shortly. Besides, there seems to be no real java-file for the program on my computer.
Meanwhile, I cannot use Java, nor can I download a higher version of Java.
Any suggestions? I welcome all kinds of help.