PyCharm doesn't start up
Thanks for the answer guys! 
Apparently the problem was I once set a vm ram size (also in system environment) which limits Pycharm to start.
I'm new to python community and intends to use PyCharm for django framework.
However, after installing PyCharm (32 bit launcher same as my OS), the software 
can't be launched.
After double-click the pycharm icon nothing happens, also tried on pycharm.exe, pycharm.bat, and pycharm64.exe, they all failed to start.
Have tried to search about the system requirement and I believe everything fits.
My OS is 32x bit, 4gb RAM and 100+gb storage available.
Hope anyone could give me hints about this issue.
Thank you!