Are you using the registry cleaner portion of Ccleaner?
Please run chkdsk /r and sfc /scannow
Click on the Start orb , type in cmd in the Search programs and files box. When cmd is seen in Programs right click on it, then click on Run as administrator.
You will see a screen similar to the one below.
Type in chkdsk c:/r then press Enter.
You will receieve the message "CHKDSK cannot be run because it is in use by another process. Would you like to schedule this volume to be checked the next time the system restarts? <Y/N>".
Type in Y and press Enter.
Restart your computer to start the scan.
This will take a while to run, please be patient and allow it to complete the scan.
The sfc /scannow command scans all protected system files and replaces corrupted and incorrect versions with correct Microsoft versions.
Click on the Start orb , the type in cmd in the Search programs and files.
cmd will appear in Programs above, right click on it, then click on Run as administrator.
If you are prompted for an administrator password or for a confirmation, enter the password, or click Allow.
A page similar to the one below will open.
Type in sfc /scannow and then press Enter to start the scan.