Search results
Results from the WOW.Com Content Network
CHKDSK and UNDELETE in MS-DOS 5.0 have a bug which can corrupt data: If the file allocation table of a disk uses 256 sectors, running CHKDSK /F can cause data loss and running UNDELETE can cause unpredictable results. This normally affects disks with a capacity of approximately a multiple of 128 MB.
.xlsx – Excel workbook.xlsm – Excel macro-enabled workbook; same as xlsx but may contain macros and scripts.xltx – Excel template.xltm – Excel macro-enabled template; same as xltx but may contain macros and scripts; Other formats Microsoft Excel uses dedicated file formats that are not part of OOXML, and use the following extensions:
Converts an executable file into a binary file with the extension.com, which is a memory image of the program. The size of the resident code and data sections combined in the input .exe file must be less than 64 KB. The file must also have no stack segment. The command is available in MS-DOS versions 1 through 5.
It included a more user-friendly interface than CHKDSK, more configuration options, [2] [3] and the ability to detect and (if possible) recover from physical errors on the disk. This replaced and improved upon the limited ability offered by the MS-DOS recover utility. [4] Unlike CHKDSK, ScanDisk would also repair crosslinked files. [5]
Despite having an ".exe" file extension, native applications cannot be executed by the user (or any program in the Win32 or other subsystems). An example is the autochk.exe binary that runs chkdsk during the system initialization "Blue Screen". Other prominent examples are the services that implement the various subsystems, such as csrss.exe.
There are two file recovery mechanisms in the TestDisk package: [2] TestDisk proper uses knowledge of the filesystem structure to perform "undelete". PhotoRec is a "file carver". It does not need any knowledge of the file system, but instead looks for patterns of known file formats in the partition or disk image.
This method of file protection was basic. It determined system files by file extension and file path. It was able to restore files from the installation media or a source specified by the user. Windows 98 did not offer real-time system file protection beyond file attributes; therefore, no preventive or reactive measure was available.
CompactOS is an improved variant of WIMBoot from Windows 8.1, where system files could be stored in a compressed WIM image on a hidden disk partition, [22] and the WOF filter driver would decompress file contents from that WIM file; using alternate data streams instead of read-only WIM images allows CompactOS to recompress system files when ...