DisableLastAccess = 1 means Last access time updates are disabled. 
fsutil command can query and also set the NTFS volume behavior parameter DisableLastAccess which controls whether access times are updated or not. In this case you can enable updating the last access time using fsutil tool.įsutil is a command line tool to perform task related to NTFS and FAT filesystems. Such applications need to know accurate last accessed time of your files. So why do we still need the accessed time attribute if its not being updated? Lets say you have a backup application that backsup files that are accessed after a specified date or an archiving software which moves all files that are not accessed in the last six months to a secondary storage location.
Check the timestamps, you'll see the modified time has changed as you would expect but still no change to the accessed time. Open the file again and add some text in it, save. Check the file timestamps again, you'll notice nothing has changed eventhough you have opened the file for read. Now open the file in a Notepad and close it without making any changes. Note down the Created, Modified, and Accessed date and times. 
Right click the file icon and bring up the properties sheet. To improve the performance of NTFS filesystem in Windows 10 (and previous versions starting from Windows Vista) the last access times of files and directories are NOT updated. So every time a user access a file this timestamp needs to be updated, which is a bit of an overhead especially if you are not too keen on this file attribute. 
Last access timestamp of a file is the last date and time when that file was opened for reading or writing.
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