UltraDefrag

I saw that it comes with a folder that has a portable version, but again, I don't think it can be truly portable because it has to install drivers to run. Also, boot-time scans aren't really a portable feature.

I wasn't trying to attack you for using an alternate download, I was just curious. And you are correct that the guidelines do not say you have to use the developer's download, but it's typically preferred.

"defrag for the registry and page file." sounds very useful. I would appreciate if someone would look into this.

Driver support in the launcher is ready to be tested. I think it should all work perfectly, but it's the sort of area I'd recommend that you test in a virtual machine which you can easily revert if something did go wrong.

I did a little research. The following thread explains compacting in UltraDefrag:

Use of the word "compact" is...
http://sourceforge.net/projects/ultradefrag/forums/forum/709672/topic/35...

"Compact" is a short word that makes sense because the empty gaps between files on the HDD are closed, causing them to be located in the faster areas of the HDD and also reducing future fragmentation (when more files are added). The real problem about the UltraDefrag term "compact" is that compacting files also defrags them, and UltraDefrag neglects to make that clear.

In other words, it makes no sense to first defrag and then compact. Compact alone will lead to the same result. Defragging without compacting completes in less time though.

UltraDefrag's compacting is shifting files to the beginning of the volume, thereby removing the spaces between files and increasing usable free space (as well as increasing performance because the beginning of a disk drive is faster than the end).

The optimizations in JkDefrag are much more comprehensive:

JkDefrag v3.36
http://www.kessels.com/JkDefrag/

Phase 3: Optimize

• On most harddisks the beginning of the harddisk is considerably faster than the end, sometimes by as much as 200 percent! See the link to "HD Tune" in the "See Also" chapter for a nice little free program to measure your disk. The default JkDefrag optimization strategy therefore moves all files to the beginning of the volume. It is intended for daily use and will simply fill gaps with files from above, very quick and with very little data movement.
• JkDefrag classifies files into 3 zones: directories (zone 1), regular files (zone 2), and SpaceHogs (zone 3). Directories are perhaps the most accessed data on disk, so zone 1 is placed at the beginning of the harddisk. After the directories comes a free area (see below), then zone 2 with regular files, another free area, and then zone 3 with SpaceHogs (less important files that take up a lot of space). The beginning and end of the zones is determined automatically, see the "-f" option.
• A running computer will create and delete temporary files like there is no tomorrow. If the harddisk were completely optimized then the only place for new temporary files would be behind all the other data. Which is rather slow. So JkDefrag maintains a free space of 1% of the total disk space between zone 1 (directories) and zone 2 (regular files), and between zone 2 and zone 3 (SpaceHogs).
• Sorting the files on your disk can give you even more speed. There are several sorting strategies to choose from (see the "-a" options). These are all very slow and intended for occasional use only.
• Windows reserves a percentage of the disk for the MFT (Master File Table), but can place normal files there if the rest of the disk is full. The files will remain there, even when there is enough space again. JkDefrag looks for files in the MFT reserved space and moves them to normal diskspace, making the reserved space available again for the MFT.

-a N The action to perform. N is a number from 1 to 11, default is 3:
1 = Analyze, do not defragment and do not optimize.
2 = Defragment only, do not optimize.
3 = Defragment and fast optimize [recommended].
5 = Force together.
6 = Move to end of disk.
7 = Optimize by sorting all files by name (folder + filename).
8 = Optimize by sorting all files by size (smallest first).
9 = Optimize by sorting all files by last access (newest first).
10 = Optimize by sorting all files by last change (oldest first).
11 = Optimize by sorting all files by creation time (oldest first).

These optimizations are explained in detail at the above link.