First of all registry cleaners are snake oil so avoid them. They do no significant good and can cause problems,
Try System Restore to go back to a date prior to the beginning of the problem. To run System Restore, click Start -> Programs -> Accessories -> System Tools -> System Restore. Click the box that says Show more restore points.
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You can check for corrupted system files. Open an administrator command prompt and run SFC if the above doesn't help. Click START, then type CMD in the search box, right-click CMD.EXE and click Run as administrator. Then from the command prompt type sfc /scannow.
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Good luck.
I am running windows 7 home premium and the getting started shortcut pinned to start menu by default has an arrow for sub menu of programs and now my arrow is missing. I run ccleaner but may have removed the arrow. How do I get the arrow back?

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