If you need to delete the system filesthat remained from the old, unnecessary installations of the operating system, then it can be done so:Open Windows Explorer with CTRL + E or double-click the icon "My computer".
Find the folder with old system files that you want to remove, and rename it (press F2), for example, in "Windows.del".Click the icon of the drive on which this folder resides, right-click and select "Properties". In the properties window of the disk, click "disk Cleanup". The conductor will collect data about the files on this disk and show a new dialog window where you need on the Advanced tab click the button "Clear", which is in the section "Windows Components".
Deleting old system files
If you want delete system files of the current operating system, the sequence should be:Open Windows Explorer with CTRL + E or double-click the icon "My computer".Locate the system file that you want to delete and then right-click and select "Properties". In the opened window go to the Security tab and click Advanced.In the window "advanced security settings" click the tab "Owner" and in the list "change owner to" select the line with your username.Click in all open Windows, click "OK" and then delete this system file.If after changing the file owner in the process of its removal, the system will display a message about the impossibility to perform this operation, it is likely that this file is currently being used in the operating system. To force close it, open task Manager by pressing ALT + CTRL + Delete, Processes tab, locate, click, and then click "End process". If it's the way to close the program fails, then delete the file you have by rebooting the computer in safe mode.
How to remove system <strong>files</strong>