When I clicked Defragment on Windows Defrag, I get "Disk defragmenter could not start". I'm also have some other disk reading related problems. chkdsk with the /f parameter wont run and I cant scan the disk in windows. Help?

I entered fsutil dirty query C:. It just says that C:/ is dirty, and it isnt cleaning anything. Thanks, I really appreciate all the help I can get.

i have the similar situation , my c drive is not dirty it still cannot run the defragment... help ... many thanks in advance

If you are sure that the volume is not dirty, check if the services for the disk defragmenter are set to 'automatic'. I don't recall what the exact services are, but I think DCOM process launcher and Event log, apart from the defrag service itself, are necessary to be able to run the windows defragmenter. (You should confirm this info though.). Type 'services.msc' in the run box to bring up the services list.

You can also download the free trial version of Diskeeper 2009 from their website and defrag using it. It's exactly like the full payware version except that it's limited to one month of usage. I use the full version of Diskeeper and it's awesome ...never a problem with it, and it's far better than the windows defragger.

I'm having the same problem, though I can defrag through TuneUp Utilities 2009. could it be that TuneUp Utilities is blocking my default defragmenter?

if you have another defrag utility other than the built in windows defrag, it will generally deny access to that defrag and use the other one. for example, my computer had diskeeper on it. i uninstalled it incorrectly and didnt remove some of the registry files that redirect to diskeeper, so i couldnt defrag my computer at all. so if you have another defrag utility, use that one or remove it to use the built it one...although most if not all defrag utilities are better than the built in one.