"Insufficient storage" when trying to install new app Every time I go to install a new app, I get the message "Insufficient storage", and an unable to install anything!

I am using Samsung GT19060 my internal memory is 8GB. I have not downloaded anything but anytime I try to download something it will tell me low memory space.
In short: 25 MB free internal storage is minimum requirement (source: TechniPages, AndroidCentral). If free space falls below that, the "insufficient storage" error is triggered.

For details, see:


Why does my phone keep telling me it has low storage?
Not enough storage on android device
Android “Internal Storage” used but not reported
I keep getting storage errors but I have plenty of free space, what is safe to remove from internal storage?
HTC Desire low on internal storage, I'm clueless — Any help?
Message Memory Full, Incoming message rejected


And many more -- this is a quite "frequent question". For more results, simply follow the internal-storage tag.