This bug was originally marked as duplicate of bug 181584, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE 7.4 RC1 (Build 201309162201)
VM: Java HotSpot(TM) 64-Bit Server VM, 24.0-b56, Java(TM) SE Runtime Environment, 1.7.0_40-b43
OS: Windows 8
GUEST: was back from a break. clicked on the keaborad to turn the screens on. probably memory issue.
Maximum slowness yet reported was 33538 ms, average is 33538
Created attachment 140689 [details]
seems to be a bug in jdk, reassigning
Searching through existing JDK bug reports supports the assumption that the problem is on a lower level, outside JVM's control. As reporter indicates, with the relatively small RAM the system, the solution is to add memory.