[df fails with code 0x80004004]

I am also getting this error when executing:

df.exe C: /Large *.M4V 50 /Large *.img 50 /Large *.mdr 50 /Large *.msp 50 /Large *.cab 50 /Large *.db 50 /Large *.tdb 50 /Large *.dll 50 /Large *.pdf 50 /Large *.msi 50 /Large *.zip 50 /Large *.7z 50 /Large *.rar 50 /Large *.ost 50 /Large *.pst 50 /Large *.xls 50 /Large *.doc 50 /Large *.mdb 50 /Large *.mp3 50 /Large *.wmv 50 /Large *.avi 50 /Large *.mov 50 /Large *.mpg 50 /Large *.pf *.50 /Large *.mkv 50 /Large *.vob 50 /Large *.ifo 50 /Large *.bup 50 /debug
Building File List Started
Building File List (0%)
Building File List (1%)
Building File List (2%)
Building File List (3%)
Building File List (4%)
Building File List (5%)
Building File List (6%)
Building File List (7%)
Building File List (8%)
Building File List (9%)
Building File List (10%)
Building File List (11%)
Building File List (12%)
Building File List (13%)
Building File List (14%)
Building File List (15%)
Building File List (16%)
Building File List (17%)
Building File List (18%)
Building File List (19%)
Building File List (20%)
Building File List (21%)
Building File List (22%)
Building File List (23%)
Building File List (24%)
Building File List (25%)
Building File List (26%)
Building File List (27%)
Building File List (28%)
Building File List (29%)
Building File List (30%)
Building File List (31%)
Building File List (32%)
Building File List (33%)
Building File List (34%)
Building File List (35%)
Building File List (36%)
Building File List (37%)
Building File List (38%)
Building File List (39%)
Building File List (40%)
Building File List (41%)
Building File List (42%)
Building File List (43%)
Building File List (44%)
Building File List (45%)
Building File List (46%)
Building File List (47%)
Building File List (48%)
Building File List (49%)
Building File List (50%)
Building File List (51%)
Building File List (52%)
Building File List (53%)
Building File List (54%)
Building File List (55%)
Building File List (56%)
Building File List (57%)
Building File List (58%)
Building File List (59%)
Building File List (60%)
Building File List (61%)
Building File List (62%)
Building File List (63%)
Building File List (64%)
Building File List (65%)
Building File List (66%)
Building File List (67%)
Building File List (68%)
Building File List (69%)
Building File List (70%)
Building File List (71%)
Building File List (72%)
Building File List (73%)
Building File List (74%)
Building File List (75%)
Building File List (76%)
Building File List (77%)
Building File List (78%)
Building File List (79%)
Building File List (80%)
Building File List (81%)
Building File List (82%)
Building File List (83%)
Building File List (84%)
Building File List (85%)
Building File List (86%)
Building File List (87%)
Building File List (88%)
Building File List (89%)
Building File List (90%)
Building File List (91%)
Building File List (92%)
Building File List (93%)
Building File List (94%)
Building File List (95%)
Building File List (96%)
Building File List (97%)
Building File List (98%)
Building File List (99%)
Building File List (100%)
Building File List Complete
55% of the drive is fragmented
Defragmenting drive C:
Defrag Started
Defragmenting (0%)
Defrag Aborted
Finish

df.exe.2_1_2392011-01-28_10-56.txt