Cleaning up HD & Safe, efficient way of deleting duplicate files on HD?

Hi Guys

I need some advice re cleaning up my hard drives.

I have CCleaner but I previously had a virus and during my interaction with Geeks I was advised to not use CCleaner. Now that is all sorted. I am happy to use it again but I want to keep all my passwords / favs etc.

I have a 320GB hard drive which is split in two and both are 'in the red', only a few GBs free on each drive.

I have deleted any unwanted software, deleted temp internet files and some other files.

Looking at my drives I see folders and files I do not recognise, some files eg. K51AC.BIN is 1MG and so on.

Also, is there an easy way to delete duplicate files (eg photos & movies), without going wrong? I have to be careful because some of the file names are the same eg pic 001, because that was the first picture taken at that time.

Thanks in advance.

 

I am running Vista Premium
Memory 4GB
CPU: Ath.64 QL65 X2 Dual-core 2.10 GHz
32-bit operating system