Quick question

So, I've been using CCleaner for a while now, yet I've just recently noticed this, and I'm not completely sure if it is from CCleaner or what. So, I restored my pc a few moments ago, I had a program that could not be deleted, so after the restore, I ran CCleaner to remove some registry files, and when it was done, it made a beep noise. So my question is, has CCleaner always done this? Or did it just start doing this for whatever reason?

Any information would be greatly appreciated.

CCleaner doesn't make beeping noises. Possibly the system sounds are enabled.