When you will click on Disk Clean up you will be able to select what all temporary files you want to clean.
You will see Disk cleanup button on General tab.
You can access disk clean up by right clicking on the drive for which you want to perform clean up and going to Properties.
Use disk cleanup: It is Windows in built utility which can be used to clean junk files.
Here are some easy tips to find and remove junk files from your computer. Although these files were momentarily important for your system, they end up lying uselessly, thus taking up extra space on the hard drive. Junk or temporary files are those which are created on the system because you have opened a webpage or a document which creates/saves it on your system. First let us find out what are junk files and where do they come from.