Insufficient Disk Space for US Service Pack 1 for Windows NT

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The amount of space required by the update varies from system to system, because only those files that are already installed on the system will actually be replaced. The maximum amount of files to be copied is just under 12 MB of free disk space on the partition containing the %SYSTEMROOT%\SYSTEM32 directory. There must also be enough space (about 150K) on the boot drive to replace NTLDR. Note that this free space is only needed during the update process itself. After the update program is finished, the system restarts and replaces the old copies of the files with the updated versions. At this point, all disk space used by the update program will be free.

If the update program does run out of disk space when it is copying files, you will receive the following critical error message: This error prevents Setup from continuing. You can either retry the operation or quit Setup. However, the software is not completely installed. If you quit, therefore, you need to repeat the Setup process from the beginning.

You will be given two options at this point: Retry and Exit. If you choose Retry, the update attempts the file copy again and returns the same critical error. If you choose Exit, Setup will stop. At this point, you need to free up disk space by moving or deleting files.