Slow computer, can someone explain my task manager screenshot

"According to the image... Your CPU usage is at 10%, you are using 1.55 GB of your page file.

The graphs show the history of the processor and memory usage. It looks like you have a hyperthreaded or dual core processor because there is two CPU history panes.

Handles and threads are resources programs need to run.

Physical Memory is the actual memory your system has not to include the page file.

Kernel memory is how much memory and page file windows is using."