I don't think it could harm your PC, but once a day seems a little like overkill.
If you clean out your C:\Windows\temp folder and clear your temporary internet files regularly, and defrag once every three to four weeks, you'll be fine.
Good luck,
If you clean out your C:\Windows\temp folder and clear your temporary internet files regularly, and defrag once every three to four weeks, you'll be fine.
Good luck,