Darek

I use Defragger for 2 years now. I defrag my drive with Defragger, also it was also analyzed with Defragger.

System restore is active only on drive C (system), and that's not the drive that couse this problems. No, I didn't open, append, save these large files. Literally, I didn't do nothing to them, they just sit there. I'm aware that changing the file may cause fragmentation.

I have two drives in my computer (not partitions, these are two separate drives). On drive C I have installed Windows Vista 32. Drive D is used for files such as movies, archives etc. This drive was fragmented 2 weeks ago, every file had only 1 fragment. Today I analyzed this drive and it appears that many files become fragmented. I'm talking about large, 5GB - 10GB files, that I didn't touch for months. How is that possible? I know why fragmentation occurs, but why defragmented files become fragmented even if I didn't touch it (not even opened these files)? Do Windows move these files for some reason?

After defragmentation, there's no red blocks. Yet, few days later they appear, even if the files that are now in red blocks wasn't used since defragmentation. I don't use Google Desktop, but I follow your advice and turned Windows Indexing Service off. We'll se If that helps.

I have question about fragmentation in general. I know how fragmentation works and why it happens, but I can't explain this situation: I have partition where I store all my movies, music, and nothing else. So most of the files are about 700MB+. I'm using Defragger, and it says I have 0% fragmentation on mentioned partition. Good so far. Yet, after few days some of these 700MB+ files become fragmented, even when I didn't open these files. It looks like the files are fragmenting itself without any reason. Or maybe there's something that I don't know? My question is: why this happen? And what to do to prevent this unreasonable fragmentation.