will defragging open files
Even the best online defragmenters can't defragment everything. For example, they can't always defragment open or locked files (such as the pagefile or registry files) and must work around the hibernation file if it exists (which is as large as the RAM in use on your system).To optimize locked files, see the upcoming section on defragmentation tricks.ven the best online defragmenters can't defragment everything. For example, they can't always defragment open or locked files (such as the pagefile or registry files) and must work around the hibernation file if it exists (which is as large as the RAM in use on your system).