I am still unsure if this is due to malware, or possibly Ccleaner getting over-ambitious. After downloading some mp3 material a while back which all seemed to pass the tests as genuine I went to play some older tunes from the library without success.

Investigation showed that a small percentage of the files had been overwritten with all zeros, but remained the same length as original. I was wondering if any one else had encountered this?

I do not run dynamic anti-virus as this is an old & slow m/c, but subsequent scans revealed nowt.

Using XP pro SP2, Limewire pro 4.12.15