Disk Cleanup: deleting unnecessary files

To free some space on your hard disk for better purposes, you have to do a disk cleanup. With the Disk Cleanup utility (Start Menu, All Programs, Accessories, System tools) you have a build in tool to remove many unnecessary files from your hard disk. Select the C: drive and on the first tab check all items to delete.

However, the cleaning is not thorough, especially the 'temporary (internet) files' folders (used files from the last few days will not be cleaned)! It is better to clean them yourself as well, as shown below. Most files are system files and/or hidden, so make sure you can see those type of files in the Windows Explorer (Tools, Folder Options, tab View, enable Display the content of system folders, enable Show hidden files and folders, disable Hide extensions for known file types and disable Hide protected operating system files).