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Created attachment 165340 [details] the error log created by this bug I apologize if this report is lacking in something; it's the first time I need to ask a question myself, so please be forgiving. The IDE for some reasons pretty much stops working when an action is performed(eg; opening "Tools->Options", creating a new project or opening an existing one; you will be able to select your project from the explorer, but NetBeans will stop after that). The program is still responsive on its own, but no actions will be performed whatever you do: you may open a menu and select something, but nothing will happen after that. As this happen also when opening a new project, this means the IDE will stop working immediately after startup, if there was a previously opened project. An "unexpected exception" notification appears in the lower left corner, but it can't be opened because of this. Running the program with admin privilege and deleting cache\userdir didn't solve the problem. Attaching messages.log created when I tried to open "Tools->Option".
NetBeans 8.2 is not designed to work with JDK 9. You can only use JDK 8 as per this blog post: https://jaxenter.com/netbeans/using-apache-netbeans-incubating-jdk-9
Mr Jiri Kovalsky, I didn't know that and I thank you for the info
Switching JDK9 with JDK8 did the trick.