Unable to start elasticsearch

Hello together,
I installed elasticsearch last year to use it with kibana. It always worked
fine. When I started elasticsearch.bat in the bin folder I saw it in the
windows console and I could start kibana. But now, after I haven't used it
for 2 months, it is not starting again. If I try to run elasticsearch.bat
nothing is happening.

I am using Windows 7 and elasticsearch 1.3.2. I also have java installed.

It would be great if somebody can give me a tip what happened.
If you need further information please ask.

Thank you,

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