There are 3 acc'ts on there, make sure you sign in as "Administrator" to have full access.
Do you have hidden/system files and known extensions showing?
Double-click on the My Computer icon.
Select the Tools menu and click Folder Options.
After the new window appears select the View tab.
Let me know if there is a checkmark present at Display the contents of system folders.
Under the Hidden files and folders section check the radio button labeled Show hidden files and folders.