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.
Disk Cleanup helps free up space on your hard drive Disk Cleanup searches your drive, and then shows you temporary files, Internet cache files. The Disk Cleanup utility comes installed on Windows computers.