Cache memory is responsible for various kinds of computer problems, including slow processing speed, slow startup, lag or hang, application responding, and many others. Deleting cache files is necessary for the smooth running of the system. The cache data utilize lots of hard drive space of your computer. In simple words, cache files are temporary files that are stored on the memory to make it easier for you to access frequently used data. Like every operating system, Windows also stores different kinds of cache files on the hard drive.