List directories only
DIR /AD -A: Attribute -D: Directory
List files older than 30 days
FORFILES /D -30
Search for test.doc file, or *.doc files
dir /s test.doc dir /s *.doc
Run cipher.exe to wipe free space on C: drive or D: drive (about cipher.exe)
cipher /w:c: cipher /w:d:
System Boot Time
systeminfo | find "System Boot Time"