The error created is shown in the photo which i added. Is this a laptop issue or a software issue. I am a beginer user of material studio. Please suggest me what should i do to solve this problem. My laptop is Core i5, 2.4 GHz.
I'm not clear whether this is actually a problem or not, but I recommend you open Task Manager and see what resources are being used.
If you're running a large CASTEP calculation on your laptop, it may be using so much RAM that it is swapping data to disk ("virtual memory"); if the RAM usage is not too high, you could probably speed everything up by quitting all the other programs (e.g. Materials Studio).