Definitely, your computer is not enough powerful to handle the bulky software Pycharm.
Pycharm is a bulky IDE that requires at least 4GB of RAM and 2.5GB of drive space to give you optimal performance. These specs are minimum-supportive when your laptop or PC is new. If it’s old, Pycharm will not work optimally on it.
Solution
Check whether your windows is updating itself or various other background task is running in the background. Disable all these tasks and windows updates while using Pycharm. This will free your RAM and allow your Pycharm to breathe openly.
Secondly, if your computer is not good enough to handle Pycharm, you can switch to other IDEs and code editors. One of the best IDE for Python is VS Code which is comparatively less bulky than Pycharm. Here is the list of the best IDE for Python.