hp86

Hello i just downloaded CCleaner and it seems like a great program so far. Sorry is this question has been asked i just couldnt find a straight forward answer. I ran "scan for issues" on registry and over 200 issues popped up. CAN I HIT THE FIX SELECTED ISSUES AND BE OK? I called geek squad and someone told me that some might be bad and shouldn't be fixed, another said to fix them all. ? ?