Black Candles are bearish lines in candlestick and candlevolume charts. They signify that the closing is lower than opening for that time period.
CHKDSK, short for Check Disk, is a utility that checks the integrity of the files and file structure of your hard disk. I'll walk you through it. I have disk problems and you said I should run CHKDSK. Great.
The Disk Cleanup tool. The Disk Cleanup tool has been around for quite some time and is designed to allow you to easily clean out old and unnecessary files that can clog up your hard disk; it's the perfect place for Microsoft to add the new Windows Update Cleanup feature, which is designed to weed through the WinSxS folder and eliminate waste.