i am using photoshop CC, whenever i am trying to use black and white effect by pressing ctrl+shift+alt+b
or by clicking the option from image>adjustem> balck and white, immediately my system is getting hanged and nothing is working. If a press cltr+alt+del then the taskbar is apperaring after 3mins and showing that 99% of my ram is getting utilised, and if i am trying to end the task that is also not working, ultimately i have to restrat my computer by pressing power button.
the same is happening every time
i have windowa 7 ultimate, intel i3 3rd gen, 4gb ram.
You have a miserly amount of RAM. The minimum requirements stated by Adobe are overly optimistic,
These days, 8 GB is considered the minimum. I run CS6 with 16 GB, others have 32 GB, 64 GB and more installed.
This might or might not be the cause of your issue, just to be clear. Regardless of your issue, you have way too little RAM.