Windows XP and Vista evil trick
Requirement: victim workstation using USB keyboard.
C:\>echo y | chkdsk /r c:The type of the file system is NTFS.Cannot lock current drive. Chkdsk cannot run because the volume is in use by anotherprocess. Would you like to schedule this volume to bechecked the next time the system restarts? (Y/N)This volume will be checked the next time the system restarts.
C:\>
CHKDSK = Checks a disk and displays a status report.
/R Locates bad sectors and recovers readable information
The /R takes 5 passes on a restart. Usual run time of an hour (give or take)
So what is the evil trick?
If you run this command on the victim’s machine; the next time they restart they will go into a good hour long hard drive check. Okay so what? They will be prompted with a 10 second count down to skip.
However, because of the way windows loads the USB keyboard drivers they will be unable to skip. No driver support! This will be highly frustrating to the victim as the USB keyboard will work in BIOS (before Windows) and obviously works in Windows. Hour long impediment.
Fixes: 1) find PS2 keyboard 2) plug it in 3) if no ps2 plug (common) wait for it to finish.
Enjoy, and use with caution as this could be done to you too. Healthy computing