So, you think, you have fragmentation issues?
See attached http://www.gog.com/en/forum/general/time_to_defrag/post1

Mydefrag did help after some free space cleanup.

MyDefrag is truly excellent still. Can't recommend it enough. Your OS writes and rewrites to your OS hard drive like crazy. It's part of normal operation and it does accumulate much quicker than storage drives, etc. However, something is not right with the results from Auslogics. Try MyDefrag. I'm assuming this hard drive is not an SSD. If it is, DO NOT degfrag it.

As long as you don't mind shelling out a bit of cash, this may be of some use.

http://download.cnet.com/Diskeeper-12-Professional/3000-2094_4-10023645.html?tag=sideBar;downloadLinks

But seems like the MyDefrag development is no longer active. The latest build dated back in 2010.

Maybe they perfected it already back then? Ok maybe not...

Ps. I think Windows 8 introduced some new file system on top of existing NTFS (ReFS?), but was it relevant only for certain (server) Win8 editions? Just wondering whether defrag utility developers are now in a hurry to add support for ReFS?

Some files will always remain fragmented due to various technical reasons. This is normal and expected, not something you need a third-party tool to "fix", and also why Microsoft moved to displaying a vague percentage; the fragmentation state of specific files is no longer important due to various OS improvements.

In Windows 7 and 8 the defragmenter was upgraded to give a percentage and the ability to start/stop the processing of individual drives on demand.

ReFS is only in the Server versions (for now) where third-party tools are unlikely to be used, so this is probably a low priority for them.

I've heard some good reports on this program. What are your thoughts about it?

It works fine . They are offering a 30 days free trial for the software : http://www.disktrix.com/free-trial.php

Try UltraDefrag. It's an open source, free and pretty powerful if you're advance user by accessing cmd. The development still active and they just released a new version which include support for Windows 8.

http://ultradefrag.sourceforge.net/en/index.html?comparison

Since it's an open source, you can expect regular small update or fixes.

Ever since Windows 7 I never bothered with manual defragmentation. Current fragmentation of my two partitions: 1%.

I think mine was about 22% and I managed to get it to around 12. About half the space is free.

I also appeared to have some sort of virus - thanks Norton for not catching it! - and it actually had something to do with Gamefly files, or at least that's how it found its way in. I had to download a program from CNet to take care of it.