I've just installed a new and quite large hard disk and now that I've
got the space I'm trying to free up lots of room on my C: partition so
I can defrag the hard disk regularly and hopefully speed up my
machine. Defrag requires about 15% spare space in order to work
properly, but I've only succeeded in getting it to about 13% free.
However the defragmentation report, which showed the list of files
which couldn't be defragmented, included a whole bunch of 455 megabyte
files called \windows\installer\*.msp
What are they for? Can they be deleted or, better yet, moved to one
of the bigger partitions I'm using for data or programs which now have
about 80% free space?
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