What are System Files?

The System File format is used to store critical computer data to be used by an operating system. Some examples include device drivers, system libraries, and other critical configuration details. Important to the functioning of the operating system, companies like Microsoft also implement certain precautions like applying a system attribute to prevent accidental deletion of such files.

Popular System File Extensions


System File Types

File Database Breakdown - System File Extensions


Top System File Extensions

File Extension Total Number of Files Oldest File (Date) Latest File (Date)
OVERRIDETASKS 3 Microsoft.Common.OverrideTasks
(06/02/2012)
Microsoft.Common.OverrideTasks
(03/18/2017)
GID 17 VBAACCSP.GID
(05/10/2017)
Wspelldlg.GID
(01/10/2020)
NLD 3 wbdbase.nld
(04/14/2008)
wbdbase.nld
(04/14/2008)
EBD 6 systemsf.ebd
(04/11/2009)
ResPriStaticDb.ebd
(04/24/2017)
IDX 48 M1033DSK.IDX
(09/18/2006)
psanbla.idx
(03/05/2020)
CLB 12 R000000000001.clb
(09/18/2006)
R000000000004.clb
(02/21/2020)
THEME 76 Windows Classic.theme
(09/18/2006)
index.theme
(01/13/2020)
UCE 48 korean.uce
(11/02/2006)
SubRange.uce
(03/18/2017)
MAPIMAIL 7 Mail Recipient.MAPIMail
(09/18/2006)
Mail Recipient.MAPIMail
(03/04/2020)
BLF 2 KtmRmTm.blf
(04/24/2017)
KtmRmTm.blf
(05/10/2017)
ITEMDATA-MS 4 appsFolder.itemdata-ms
(04/24/2017)
appsFolder.itemdata-ms
(05/10/2017)
DIAGPKG 74 DiagPackage.diagpkg
(07/13/2009)
DiagPackage.diagpkg
(03/18/2017)
MYDOCS 6 My Documents.mydocs
(04/24/2017)
Documents.mydocs
(04/24/2017)
TASKS 8 Microsoft.Common.Tasks
(01/21/2008)
Microsoft.Common.Tasks
(10/05/2019)
DYC 38 XBA55P_A.DYC
(09/18/2006)
XWS75L_A.DYC
(09/18/2006)
XRM-MS 6933 MicrosoftWindowsSafeDocsMain-ppdlic.xrm-ms
(01/21/2008)
osppobjs-spp-plugin-manifest-signed.xrm-ms
(03/04/2020)
ADM 30 conf.adm
(04/14/2008)
AER_1033.ADM
(01/29/2020)
CDMP 10 wscRGB.cdmp
(09/18/2006)
wscRGB.cdmp
(03/18/2017)
EFTX 592 Verve.eftx
(05/10/2017)
Verve.eftx
(03/04/2020)
CHS 6 NOISE.CHS
(09/18/2006)
extension.chs
(01/02/2020)
FTG 1 VBAACCSP.FTG
(05/10/2017)
VBAACCSP.FTG
(05/10/2017)
ESN 3 wbdbase.esn
(04/14/2008)
wbdbase.esn
(04/14/2008)
EVTX 82929 Microsoft-Windows-Crypto-DPAPI%4BackUpKeySvc.evtx
(04/24/2017)
Microsoft-Windows-Windows Defender%4Operational.evtx
(03/30/2020)
PROPDESC 35 ie8props.propdesc
(11/21/2010)
VisioCustom.propdesc
(03/04/2020)
ADMX 2011 WindowsMediaDRM.admx
(11/02/2006)
OneDrive.admx
(03/30/2020)
SEARCHCONNECTOR-MS 12 connectedsearch-history.searchconnector-ms
(06/18/2013)
Microsoft Office Outlook.searchconnector-ms
(02/15/2020)
CI 17 00010001.ci
(04/24/2017)
extension.ci
(01/02/2020)
HHK 20 scoped_6.hhk
(04/24/2017)
Index.hhk
(11/28/2019)
WPRP 1 provtrace.wprp
(03/18/2017)
provtrace.wprp
(03/18/2017)
JPN 5 noise.jpn
(09/18/2006)
SmartVCD.Jpn
(11/25/2019)
BR2 1 M1033Eva.BR2
(03/18/2017)
M1033Eva.BR2
(03/18/2017)
CUR 1353 beam_rm.cur
(09/18/2006)
Hand.cur
(02/11/2020)
AUTOMATICDESTINATIONS-MS 6 f01b4d95cf55d32a.automaticDestinations-ms
(04/24/2017)
5f7b5f1e01b83767.automaticDestinations-ms
(04/24/2017)
DBL 5 wpa.dbl
(04/24/2017)
wpa.dbl
(08/29/2019)
ITS 128 MSB1ENFR.ITS
(05/10/2017)
MSB1FREN.ITS
(03/04/2020)
GMMP 20 Graphics.gmmp
(09/18/2006)
Graphics.gmmp
(03/18/2017)
GRL 6 Pending.GRL
(11/02/2006)
Active.GRL
(03/18/2017)
VXD 13 dsound.vxd
(04/14/2008)
ndphlpr.vxd
(02/21/2020)
CUSTOMDESTINATIONS-MS 9 f01b4d95cf55d32a.customDestinations-ms
(04/24/2017)
f01b4d95cf55d32a.customDestinations-ms
(04/24/2017)
ADML 19361 WindowsMediaPlayer.adml
(11/02/2006)
OneDrive.adml
(03/30/2020)
DESKLINK 7 Desktop (create shortcut).DeskLink
(09/18/2006)
Desktop (create shortcut).DeskLink
(03/04/2020)
ANI 173 drum.ani
(11/02/2006)
pdf2html.ani
(02/12/2020)
HTT 14 PUBPLACE.HTT
(04/24/2003)
eTransmit.htt
(01/20/2020)
LIBRARY-MS 39 RecordedTV.library-ms
(07/14/2009)
SavedPictures.library-ms
(11/23/2019)
PROFILE 9 WWAHost_AppexSports.profile
(07/26/2012)
CSharp.Profile
(12/02/2019)
NT 8 autoexec.nt
(04/14/2008)
config.nt
(04/24/2017)
CWL 1 SAMPLE1.CWL
(05/10/2017)
SAMPLE1.CWL
(05/10/2017)
CNT 98 CNBJHLP2.CNT
(09/18/2006)
speech.cnt
(03/05/2020)
IEM 4 inetset.iem
(11/02/2006)
inetset.iem
(04/12/2011)
SETTINGCONTENT-MS 604 AAA_SystemSettings_Display_Orientation.settingcontent-ms
(07/24/2013)
NameSpace_Classic_0_FlashPlayerCPLApp.cpl.settingcontent-ms
(04/24/2017)
PPD 1661 BRH270_3.PPD
(09/18/2006)
MSXPSINC.PPD
(03/04/2020)
FTS 6 VBAACCSP.FTS
(05/10/2017)
BS9532.FTS
(05/10/2017)
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