If you are administrator and don't have access to the files, you may not be allowed to change the security permissions to add yourself either -- you may need to take ownership of the files in question first.
go to my computer -> right-click on the C:\ drive -> properties -> security
Make sure that administrator and/or your account is added as 'full control'.
If you don't have the ability to change the security permissions, you may have to go to Advance -> Ownership -> Take ownership first.
Note that that will undo any explicit ownership & security permissions on your files that you had set up.
if you still can't get access to subfolders or files in them, you may need to check the 'replace permission entries on all child objects' under 'advanced'.
go to my computer -> right-click on the C:\ drive -> properties -> security
Make sure that administrator and/or your account is added as 'full control'.
If you don't have the ability to change the security permissions, you may have to go to Advance -> Ownership -> Take ownership first.
Note that that will undo any explicit ownership & security permissions on your files that you had set up.
if you still can't get access to subfolders or files in them, you may need to check the 'replace permission entries on all child objects' under 'advanced'.