What database package are you using?
Its possible that your Disk file structure may be having some corruption problems. If so, you could perform a check and repair operation as follows:-
- If you are using windows 7, "Windows Start">"All Programs">"Accessories">RIGHT-Click on "Command Prompt" and select "Run As Administrator" and click "yes" to open a a Command prompt window
- Within the 'Command prompt' window using the keyboard type the following character text "Chkdsk /F" and then press the keyboard enter key.
- In response to the windows message "Y/N" question that appears on screen, enter "Y" and press the the enter key.
- Now restart the computer and when Windows reboots it will commence a check disk operation and automatically attempt to fix any disk errors it may find. Let it run which could take some time depending on what it finds.
- When the process is completed Windows will restart automatically where you can then test to see if the problem is fixed.