Hi,
• Did you perform clean install or upgrade installation of Windows 8?
• Are you using Administrator or Standard account?
• Are you facing issue with internal or external hard drive?
• Which partition are you trying to format?
• Did you use Bitlocker or any other third party program to encrypt the drive?
Caution: Doing any of the following will erase all data: please make sure you have a backup before continuing.
Step 1:
Try to take permission of Hard disk and then try formatting the hard disk and check.
a) Right click your Hard Drive.
b) Go to Properties.
c) Click Security.
d) Click Edit under a quote "To change permissions, click Edit."
e) Click Add.
f) Type in "everyone" in the white box.
g) Then check in the box "Full Control".
h) Press OK.
This makes the hard drive usable by everyone (all users and different computers)
Step 2:
Try to format it from Disk Management and check if it helps.
a) Right click on bottom left corner of the desktop and select Disk Management.
b) Right click on encrypted drive and select format.
c) If you are not able to format select delete volume.
d) After deleting Right click on Unallocated and select New Simple Volume.
e) Follow the onscreen instruction to create an New Volume.
Hope this information will be helpful