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)
ADM 7 wuau.adm
(04/14/2008)
AER_1033.ADM
(05/10/2017)
VXD 1 dsound.vxd
(04/14/2008)
dsound.vxd
(04/14/2008)
CUR 965 size4_r.cur
(09/18/2006)
aero_arrow_xl.cur
(03/18/2017)
ANI 98 sizens.ani
(11/02/2006)
aero_busy_l.ani
(03/18/2017)
UCE 48 ShiftJIS.uce
(11/02/2006)
ShiftJIS.uce
(03/18/2017)
DESKLINK 6 Desktop (create shortcut).DeskLink
(09/18/2006)
Desktop (create shortcut).DeskLink
(04/24/2017)
ADML 825 WindowsMediaDRM.adml
(11/02/2006)
PowerShellExecutionPolicy.adml
(03/18/2017)
ADMX 825 WindowsMediaDRM.admx
(11/02/2006)
DeviceInstallation.admx
(03/18/2017)
PROPDESC 7 ie8props.propdesc
(11/21/2010)
VisioCustom.propdesc
(05/10/2017)
BR2 1 M1033Eva.BR2
(03/18/2017)
M1033Eva.BR2
(03/18/2017)
SEARCHCONNECTOR-MS 11 connectedsearch-music.searchconnector-ms
(06/18/2013)
winrt--{S-1-5-21-2285923199-3735160910-319892800-1001}-.searchconnector-ms
(04/24/2017)
ITEMDATA-MS 4 appsFolder.itemdata-ms
(04/24/2017)
appsFolder.itemdata-ms
(05/10/2017)
CWL 1 SAMPLE1.CWL
(05/10/2017)
SAMPLE1.CWL
(05/10/2017)
XRM-MS 695 MicrosoftWindowsSafeDocsMain-ppdlic.xrm-ms
(01/21/2008)
osppobjs-spp-plugin-manifest-signed.xrm-ms
(05/10/2017)
CI 16 00010001.ci
(04/24/2017)
00010004.ci
(05/10/2017)
DIAGPKG 74 DiagPackage.diagpkg
(07/13/2009)
DiagPackage.diagpkg
(03/18/2017)
FTG 1 VBAACCSP.FTG
(05/10/2017)
VBAACCSP.FTG
(05/10/2017)
DYC 38 XBA55L_A.DYC
(09/18/2006)
XWS75L_A.DYC
(09/18/2006)
CDMP 10 wscRGB.cdmp
(09/18/2006)
wscRGB.cdmp
(03/18/2017)
EVTX 471 Microsoft-Windows-SMBClient%4Operational.evtx
(04/24/2017)
Microsoft-Windows-PrintService%4Admin.evtx
(05/10/2017)
ESN 3 wbdbase.esn
(04/14/2008)
wbdbase.esn
(04/14/2008)
CLB 7 R000000000001.clb
(09/18/2006)
R000000000006.clb
(04/24/2017)
DBL 4 wpa.dbl
(04/24/2017)
wpa.dbl
(05/10/2017)
SETTINGCONTENT-MS 604 AAA_SystemSettings_Keyboard_IsSpellcheckingEnabled.settingcontent-ms
(07/24/2013)
NameSpace_Classic_0_FlashPlayerCPLApp.cpl.settingcontent-ms
(04/24/2017)
NLD 3 wbdbase.nld
(04/14/2008)
wbdbase.nld
(04/14/2008)
HTT 11 PUBPLACE.HTT
(04/24/2003)
SCHEMA.HTT
(05/10/2017)
GMMP 20 Graphics.gmmp
(09/18/2006)
Graphics.gmmp
(03/18/2017)
NT 8 autoexec.nt
(04/14/2008)
config.nt
(04/24/2017)
CHS 5 NOISE.CHS
(09/18/2006)
NOISE.CHS
(08/22/2013)
EFTX 86 Median.eftx
(05/10/2017)
Origin.eftx
(05/10/2017)
OVERRIDETASKS 3 Microsoft.Common.OverrideTasks
(06/02/2012)
Microsoft.Common.OverrideTasks
(03/18/2017)
IEM 4 inetset.iem
(11/02/2006)
inetset.iem
(04/12/2011)
GRL 6 Pending.GRL
(11/02/2006)
Pending.GRL
(03/18/2017)
THEME 42 Windows Classic.theme
(09/18/2006)
theme2.theme
(03/18/2017)
JPN 4 noise.jpn
(09/18/2006)
noise.jpn
(06/18/2013)
MAPIMAIL 6 Mail Recipient.MAPIMail
(09/18/2006)
Mail Recipient.MAPIMail
(04/24/2017)
MYDOCS 6 My Documents.mydocs
(04/24/2017)
Documents.mydocs
(04/24/2017)
BLF 2 KtmRmTm.blf
(04/24/2017)
KtmRmTm.blf
(05/10/2017)
PPD 1614 BRH345_3.PPD
(09/18/2006)
MSCOL11.PPD
(05/10/2017)
CNT 44 CNBJHLP.CNT
(09/18/2006)
EQNEDT32.CNT
(05/10/2017)
WPRP 1 provtrace.wprp
(03/18/2017)
provtrace.wprp
(03/18/2017)
HHK 18 scoped_8.hhk
(04/24/2017)
A0000021.hhk
(05/10/2017)
GID 13 msaccess.GID
(05/10/2017)
BS9532.GID
(05/10/2017)
LIBRARY-MS 21 RecordedTV.library-ms
(07/14/2009)
CameraRoll.library-ms
(04/24/2017)
IDX 7 M1033DSK.IDX
(09/18/2006)
dmrc.idx
(05/10/2017)
EBD 6 systemsf.ebd
(04/11/2009)
ResPriStaticDb.ebd
(04/24/2017)
CUSTOMDESTINATIONS-MS 9 f01b4d95cf55d32a.customDestinations-ms
(04/24/2017)
f01b4d95cf55d32a.customDestinations-ms
(04/24/2017)
TASKS 6 Microsoft.Common.Tasks
(01/21/2008)
Microsoft.Common.Tasks
(03/18/2017)
AUTOMATICDESTINATIONS-MS 6 f01b4d95cf55d32a.automaticDestinations-ms
(04/24/2017)
5f7b5f1e01b83767.automaticDestinations-ms
(04/24/2017)
ITS 28 MSB1ESEN.ITS
(05/10/2017)
MSB1FRAR.ITS
(05/10/2017)
PROFILE 6 WWAHost_AppexSports.profile
(07/26/2012)
wwahost_AppexTravel.profile
(07/26/2012)
FTS 6 VBAACCSP.FTS
(05/10/2017)
MSGRAPH.FTS
(05/10/2017)
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