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)
PROFILE 9 WWAHost_AppexSports.profile
(07/26/2012)
CSharp.Profile
(12/02/2019)
FTG 1 VBAACCSP.FTG
(05/10/2017)
VBAACCSP.FTG
(05/10/2017)
IDX 48 M1033DSK.IDX
(09/18/2006)
psanbla.idx
(03/05/2020)
DYC 38 XBA55L_A.DYC
(09/18/2006)
XWA75P_A.DYC
(09/18/2006)
AUTOMATICDESTINATIONS-MS 6 f01b4d95cf55d32a.automaticDestinations-ms
(04/24/2017)
5f7b5f1e01b83767.automaticDestinations-ms
(04/24/2017)
THEME 76 Windows Classic.theme
(09/18/2006)
index.theme
(01/13/2020)
LIBRARY-MS 39 RecordedTV.library-ms
(07/14/2009)
SavedPictures.library-ms
(11/23/2019)
GID 17 msaccess.GID
(05/10/2017)
Wspelldlg.GID
(01/10/2020)
CWL 1 SAMPLE1.CWL
(05/10/2017)
SAMPLE1.CWL
(05/10/2017)
DIAGPKG 74 DiagPackage.diagpkg
(07/13/2009)
DiagPackage.diagpkg
(03/18/2017)
MAPIMAIL 7 Mail Recipient.MAPIMail
(09/18/2006)
Mail Recipient.MAPIMail
(03/04/2020)
GMMP 20 Graphics.gmmp
(09/18/2006)
Graphics.gmmp
(03/18/2017)
CHS 6 NOISE.CHS
(09/18/2006)
extension.chs
(01/02/2020)
ADML 19361 WindowsMediaPlayer.adml
(11/02/2006)
OneDrive.adml
(03/30/2020)
HHK 20 scoped_4.hhk
(04/24/2017)
Index.hhk
(11/28/2019)
CNT 98 CNBJHLP.CNT
(09/18/2006)
speech.cnt
(03/05/2020)
NT 8 autoexec.nt
(04/14/2008)
config.nt
(04/24/2017)
MYDOCS 6 My Documents.mydocs
(04/24/2017)
Documents.mydocs
(04/24/2017)
PROPDESC 35 ie8props.propdesc
(11/21/2010)
VisioCustom.propdesc
(03/04/2020)
EVTX 82929 Internet Explorer.evtx
(04/24/2017)
Microsoft-Windows-Windows Defender%4Operational.evtx
(03/30/2020)
CI 17 00010001.ci
(04/24/2017)
extension.ci
(01/02/2020)
IEM 4 inetset.iem
(11/02/2006)
inetcorp.iem
(04/12/2011)
OVERRIDETASKS 3 Microsoft.Common.OverrideTasks
(06/02/2012)
Microsoft.Common.OverrideTasks
(03/18/2017)
DBL 5 wpa.dbl
(04/24/2017)
wpa.dbl
(08/29/2019)
CLB 12 R000000000001.clb
(09/18/2006)
R000000000004.clb
(02/21/2020)
WPRP 1 provtrace.wprp
(03/18/2017)
provtrace.wprp
(03/18/2017)
ITS 128 MSB1ENES.ITS
(05/10/2017)
MSB1FREN.ITS
(03/04/2020)
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)
SEARCHCONNECTOR-MS 12 connectedsearch-appcmd.searchconnector-ms
(06/18/2013)
Microsoft Office Outlook.searchconnector-ms
(02/15/2020)
XRM-MS 6933 MicrosoftWindowsSafeDocsMain-ppdlic.xrm-ms
(01/21/2008)
osppobjs-spp-plugin-manifest-signed.xrm-ms
(03/04/2020)
EBD 6 systemsf.ebd
(04/11/2009)
ResPriStaticDb.ebd
(04/24/2017)
UCE 48 kanji_1.uce
(11/02/2006)
gb2312.uce
(03/18/2017)
DESKLINK 7 Desktop (create shortcut).DeskLink
(09/18/2006)
Desktop (create shortcut).DeskLink
(03/04/2020)
PPD 1661 BRH345_3.PPD
(09/18/2006)
MSXPSINC.PPD
(03/04/2020)
HTT 14 PUBPLACE.HTT
(04/24/2003)
eTransmit.htt
(01/20/2020)
CDMP 10 wscRGB.cdmp
(09/18/2006)
wscRGB.cdmp
(03/18/2017)
CUR 1353 arrow_r.cur
(09/18/2006)
HandClosed.cur
(02/11/2020)
NLD 3 wbcache.nld
(04/14/2008)
wbcache.nld
(04/14/2008)
GRL 6 Pending.GRL
(11/02/2006)
Pending.GRL
(03/18/2017)
ADM 30 inetset.adm
(04/14/2008)
AER_1033.ADM
(01/29/2020)
SETTINGCONTENT-MS 604 AAA_SettingsPageAppsDefaultsProtocolView.settingcontent-ms
(07/24/2013)
NameSpace_Classic_0_FlashPlayerCPLApp.cpl.settingcontent-ms
(04/24/2017)
BLF 2 KtmRmTm.blf
(04/24/2017)
KtmRmTm.blf
(05/10/2017)
ANI 173 drum.ani
(11/02/2006)
pdf2html.ani
(02/12/2020)
ADMX 2011 WindowsMediaDRM.admx
(11/02/2006)
OneDrive.admx
(03/30/2020)
TASKS 8 Microsoft.Common.Tasks
(01/21/2008)
Microsoft.Common.Tasks
(10/05/2019)
BR2 1 M1033Eva.BR2
(03/18/2017)
M1033Eva.BR2
(03/18/2017)
ESN 3 noise.esn
(04/14/2008)
noise.esn
(04/14/2008)
ITEMDATA-MS 4 appsFolder.itemdata-ms
(04/24/2017)
appsFolder.itemdata-ms
(05/10/2017)
FTS 6 VBAACCSP.FTS
(05/10/2017)
BS9532.FTS
(05/10/2017)
EFTX 592 Paper.eftx
(05/10/2017)
Trek.eftx
(03/04/2020)
JPN 5 noise.jpn
(09/18/2006)
SmartVCD.Jpn
(11/25/2019)
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