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)
PPD 1614 BRH400_3.PPD
(09/18/2006)
MSCOL11.PPD
(05/10/2017)
TASKS 6 Microsoft.Common.Tasks
(01/21/2008)
Microsoft.Common.Tasks
(03/18/2017)
EFTX 86 Trek.eftx
(05/10/2017)
Thatch.eftx
(05/10/2017)
GRL 6 Active.GRL
(11/02/2006)
Active.GRL
(03/18/2017)
CWL 1 SAMPLE1.CWL
(05/10/2017)
SAMPLE1.CWL
(05/10/2017)
NT 8 autoexec.nt
(04/14/2008)
config.nt
(04/24/2017)
ADM 7 inetset.adm
(04/14/2008)
AER_1033.ADM
(05/10/2017)
CNT 44 CNBJHLP2.CNT
(09/18/2006)
EQNEDT32.CNT
(05/10/2017)
CDMP 10 wsRGB.cdmp
(09/18/2006)
wsRGB.cdmp
(03/18/2017)
IDX 7 M1033DSK.IDX
(09/18/2006)
dmrc.idx
(05/10/2017)
UCE 48 SubRange.uce
(11/02/2006)
kanji_1.uce
(03/18/2017)
DYC 38 XBA55X_A.DYC
(09/18/2006)
XWA75P_A.DYC
(09/18/2006)
FTG 1 VBAACCSP.FTG
(05/10/2017)
VBAACCSP.FTG
(05/10/2017)
JPN 4 noise.jpn
(09/18/2006)
noise.jpn
(06/18/2013)
OVERRIDETASKS 3 Microsoft.Common.OverrideTasks
(06/02/2012)
Microsoft.Common.OverrideTasks
(03/18/2017)
IEM 4 inetcorp.iem
(11/02/2006)
inetset.iem
(04/12/2011)
DIAGPKG 74 DiagPackage.diagpkg
(07/13/2009)
DiagPackage.diagpkg
(03/18/2017)
HTT 11 PUBPLACE.HTT
(04/24/2003)
SMARTF.HTT
(05/10/2017)
DESKLINK 6 Desktop (create shortcut).DeskLink
(09/18/2006)
Desktop (create shortcut).DeskLink
(04/24/2017)
XRM-MS 695 MicrosoftWindowsSafeDocsMain-ppdlic.xrm-ms
(01/21/2008)
osppobjs-spp-plugin-manifest-signed.xrm-ms
(05/10/2017)
GMMP 20 Graphics.gmmp
(09/18/2006)
Photo.gmmp
(03/18/2017)
ANI 98 drum.ani
(11/02/2006)
aero_working_xl.ani
(03/18/2017)
FTS 6 VBAACCSP.FTS
(05/10/2017)
BS9532.FTS
(05/10/2017)
HHK 18 scoped_6.hhk
(04/24/2017)
A0000020.hhk
(05/10/2017)
ADMX 825 WindowsMediaDRM.admx
(11/02/2006)
WindowsUpdate.admx
(03/18/2017)
EVTX 471 Microsoft-Windows-Kernel-Power%4Thermal-Operational.evtx
(04/24/2017)
Security.evtx
(05/10/2017)
LIBRARY-MS 21 RecordedTV.library-ms
(07/14/2009)
CameraRoll.library-ms
(04/24/2017)
CLB 7 R000000000001.clb
(09/18/2006)
R000000000007.clb
(04/24/2017)
NLD 3 wbdbase.nld
(04/14/2008)
wbdbase.nld
(04/14/2008)
AUTOMATICDESTINATIONS-MS 6 f01b4d95cf55d32a.automaticDestinations-ms
(04/24/2017)
5f7b5f1e01b83767.automaticDestinations-ms
(04/24/2017)
CUR 965 size3_m.cur
(09/18/2006)
aero_link_xl.cur
(03/18/2017)
ITEMDATA-MS 4 appsFolder.itemdata-ms
(04/24/2017)
appsFolder.itemdata-ms
(05/10/2017)
PROPDESC 7 ie8props.propdesc
(11/21/2010)
VisioCustom.propdesc
(05/10/2017)
SETTINGCONTENT-MS 604 AAA_SystemSettings_Personalize_LockScreenSlideshowDuration.settingcontent-ms
(07/24/2013)
NameSpace_Classic_0_FlashPlayerCPLApp.cpl.settingcontent-ms
(04/24/2017)
VXD 1 dsound.vxd
(04/14/2008)
dsound.vxd
(04/14/2008)
CHS 5 NOISE.CHS
(09/18/2006)
NOISE.CHS
(08/22/2013)
ESN 3 wbdbase.esn
(04/14/2008)
wbdbase.esn
(04/14/2008)
DBL 4 wpa.dbl
(04/24/2017)
wpa.dbl
(05/10/2017)
MAPIMAIL 6 Mail Recipient.MAPIMail
(09/18/2006)
Mail Recipient.MAPIMail
(04/24/2017)
GID 13 vba_acc.GID
(05/10/2017)
BS9532.GID
(05/10/2017)
SEARCHCONNECTOR-MS 11 connectedsearch-paths.searchconnector-ms
(06/18/2013)
winrt--{S-1-5-21-2285923199-3735160910-319892800-1001}-.searchconnector-ms
(04/24/2017)
THEME 42 Windows Classic.theme
(09/18/2006)
theme1.theme
(03/18/2017)
WPRP 1 provtrace.wprp
(03/18/2017)
provtrace.wprp
(03/18/2017)
CUSTOMDESTINATIONS-MS 9 f01b4d95cf55d32a.customDestinations-ms
(04/24/2017)
7e4dca80246863e3.customDestinations-ms
(04/24/2017)
ITS 28 MSB1ESEN.ITS
(05/10/2017)
MSB1ENES.ITS
(05/10/2017)
BLF 2 KtmRmTm.blf
(04/24/2017)
KtmRmTm.blf
(05/10/2017)
PROFILE 6 WWAHost_AppexSports.profile
(07/26/2012)
wwahost_AppexTravel.profile
(07/26/2012)
BR2 1 M1033Eva.BR2
(03/18/2017)
M1033Eva.BR2
(03/18/2017)
ADML 825 WindowsMediaDRM.adml
(11/02/2006)
PowerShellExecutionPolicy.adml
(03/18/2017)
MYDOCS 6 My Documents.mydocs
(04/24/2017)
Documents.mydocs
(04/24/2017)
EBD 6 systemsf.ebd
(04/11/2009)
ResPriStaticDb.ebd
(04/24/2017)
CI 16 00010001.ci
(04/24/2017)
00010001.ci
(05/10/2017)
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