To disable automatic disk checking at Windows startup through registry, go to the following registry key:

HKEYLOCALMACHINE\SYSTEM\CurrentControlSet\Control\Session Manager

In the right hand pane, double click BootExecute.

The default value of the key is autocheck autochk *

• means every drive is checked for consistency. Just add /K:C at the end before *. /K switch will disable autocheck on C: drive at Windows startup. So the final value should look like this:

autocheck autochk /k:C *

If you want to add more drives, the key should look like this: (disabling C and D drives)

autocheck autochk /k:C /k:D *

If you want to restore everything to default, just replace the key with the default one i.e.,

autocheck autochk *