Assuming you have already done this, but just in case.
Right click ->
Properties ->
Security ->
Advanced ->
Owner Tab->
Edit ->
Choose current User from list
Check box to
Replace Owner on Subcontainers and Objects.
Click
Apply
Right click ->
Properties ->
Security ->
Advanced,
Permission Tab:
Check box
Replace all child object permissions with inheiritable perminssions from this object.
If current user is in the Permission entries, select it, hit
Edit and ensure it has full control.
If it isn't, then click
Add and add it with Full Control.
Then Apply.
But it really sounds like there are issue with the disk. A tool like
TestDisk might help.