Originally published at Computer Help. Please leave any comments there.

One of my XP systems developed a strange problem: while trying to start a disk defragment, I get:

MMC cannot open dfrg.msc. This may be because the file does not exist, is not an MMC console, or was created by a later version of MMC.

I look around the net, and find all sorts of answers (of which, none work).

Then I carefully analysed the error string:

file does not exist: false… the file is there

is not an MMC console… possible, as I had to do a repair install of windows XP recently

later version of MMC… possible, but should have been picked up when I did my MS updates.

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