If all these ways can't work, next is the easiest.
Sometimes the default browser settings may be not appropriate, then you can change the settings to your likings. It is simple job to do, follow guidance below to make changes now. Below steps are based on Internet Explorer browser.
1.Launch IE browser, find and click Tool > Internet Options, the Internet Options window will display.
2.Now you can see 7 main tabs in the new window: General, Security, Privacy, Content, Connections, Programs, Advanced.
3.Switch to related tab and select settings you want to change, click OK after changes.
1.Click Computer on your desktable and right click Disk C to select Properties.
2.Click Disk Cleanup, you'll see a window just as right, this process need some minutes.
3.Under Disk Cleanup there are Files to delete, tick the files you don't need to free pc space, finally click OK.