xwin boots slowly when loading from 4fs file.

[spintronic]

I installed Slacko 5.5 4G on a Compaq Presario CQ62 on my main Windows 7 partition. The install went well and the system boots up just fine without a file image. But when I save a 2 GB file image onto the hard disk and boot from that xwin hangs for several minutes before finally loading up. I saved my setup in a ext4 file format. I had previously defragmented the hard disk. After loading the desktop is pretty sluggish. Any ideas why?

Thank you.