System Files

System files typically have to do with different operating systems, including Windows, Linux, and Mac.

Common system file examples are system libraries, themes, icons, and others.

System file extensions include but not limited to .DLL, .SYS, .DRV, .CAB, etc.

File Extension File Type Popularity
.CONFIGPROFILE Apple Configuration Profile 4
.EVT Windows Event Viewer Log File 3.5
.MOBILECONFIG Apple Mobile Configuration File 4.5
.DIAGCAB Troubleshooting Pack Cabinet File 4.4
.CLB COM+ Catalog File 4.6
.ICONPACKAGE IconPackager Theme File 4.7
.HCD Samsung Android Firmware File 4.2
.PROVISIONPROFILE Apple Provision Profile 4
.NBH ROM Update Utility Image File 3.8
.IFW INTUS Firmware File 3.8
.NTFS NTFS Partition File 4.3
.HIV Windows Registry Hive File 4.7
.EVTX Windows 7 Event Log File 3.8
.EFI Extensible Firmware Interface File 4.4
.CNT Help Contents File 4.5
.CHK Netgear Router Firmware File 4.2
.CAP ASUS BIOS Update File 3.5
.C32 Syslinux COM32 Module 4.3
.CRASH Mac OS X Crash Log File 4.1
.CGZ Linux Drivers Archive 4
.FOTA Firmware Over-the-Air File 4.7
.ETL Microsoft Event Trace Log File 4.3
.EBD Windows EBD System File 4.7
.IDX Index File 4.2
.JOB Windows Task Scheduler Job File 4.4
.CPI Codepage Information File 4
.CPL Windows Control Panel Item 4.7
.BK2 Windows Indexing Service Data File 4.2
.BOM Mac OS X Bill of Materials File 4.2
.BK1 Windows Indexing Service File 3.8
.SDB Custom Application Compatibility Database 4.5
.BUD Binary Printer Description File 3.2
.BIO BIOS File 4.6
.PRT Printer Driver File 4.2
.CPR Windows Phone Display Settings File 4
.BASHRC Bash Non-Interactive Login Shell File 4.5
.BASH_HISTORY Bash History File 4.7
.BASH_PROFILE Bash Interactive Login Shell File 4.5
.208 ASUS Notebook BIOS 208 Update File 4.5
.000 Indexing Service Data File 4.5
.0 Shared Library Link File 4.5
.MOD GRUB Module 4
.INS Internet Naming Service File 4.4
.MDMP Windows Minidump 4.6
.HDMP Windows Heap Dump 4.3
.BMK Help Bookmarks 3.2
.BLF CLFS Base Log File 4.2
.BCD Windows Boot Configuration Data File 4.4
.ASEC Android Secure Application File 4.5
.ANN Help Annotations 3.2
.ANI Windows Animated Cursor 4.7
.AML ACPI Machine Language File 4.6
.ADV Audio Driver File 3.6
.ADMX Group Policy Administrative Template File 4.7
.ADM Administrative Template File 4.5
.386 Windows Virtual Device Driver 4.3
.73U TI-73 Explorer Operating System File 3.5
.8XU TI-83 and TI-84 Plus Operating System File 4
.8CU TI-84 Plus C Operating System File 4.2
.3FS Puppy Linux Save State File 4
.2FS Puppy Linux Save State File 4.1
.PPM Post Programmable Memory File 3.2
.MSSTYLES Windows XP Style 4.5
.SDT Siemens Desktop Theme File 4.6
.KEY Security Key 4.2
.DESKTHEMEPACK Windows 8 Desktop Theme Pack File 4.5
.THEME Microsoft Plus! Desktop Theme 4.5
.CUR Windows Cursor 4.7
.ICO Icon File 4.5
.SYS Motorola Driver File 4.5
.SYS Windows System File 4.5
.SCR Windows Screensaver 4.7
.PRF Windows System File 4.3
.DRV Device Driver 4.2
.DLL Dynamic Link Library 4.6
.DAT Windows Registry Hive File 4.5
.CAB Windows Cabinet File 4.5
.BIN Router Firmware File 4.3
.ZONE.IDENTIFIER Windows Zone Identifier File 4.3
.XFB Xserve RAID Firmware Binary File 3.3
.XRM-MS Microsoft Security Certificate 3.2
.WGZ S60 Web Runtime Widget Package 4
.VX_ Compressed Virtual Device Driver File 4.5
.WPX Printer Description File 4.2
.WDGT Dashboard Widget 4.4
.WER Windows Error Report 4.1
.WDF Windows Driver Foundation File 4.5
.WPH Phoenix BIOS File 3.8
.WEBPNP Web Point and Print File 4
.VXD Virtual Device Driver 4.3
.VGD Generic CADD VGA Driver 4
.VGA VGA Display Driver 4.5
.TRX_DLL Windows Startup File 4.2
.TDZ Drobo Firmware File 3.5
.THA Windows Thai Noise-Words List File 3.8
.UCE Windows UCE System File 4.2
.SQM Service Quality Monitoring File 4
.SAVER Mac OS X Screen Saver 4
.SB Slax Bundle 3.6
.STR Windows Screensaver File 4
.SBF Android System File 4.4
.SAVEDSEARCH Spotlight Saved Search 4
.SHSH iPhone/iPod Touch SHSH Blob File 4.3
.SEARCHCONNECTOR-MS Windows Search Connector File 4.5
.SPL Windows Print Spool File 4.5
.SHD Windows Print Job Shadow File 4.6
.RUF Samsung DVD and Blu-ray Player Firmware File 4
.RC2 Samsung Mobile Device Firmware File 3.2
.RS Windows Rating System File 4
.SBN Cisco IP Phone Firmware File 4.2
.QKY Quirky Kernel 3.8
.SCF Windows Explorer Command 4.1
.SWP Swap File 4.2
.REG Registry File 4.7
.REGTRANS-MS Registry Transaction Log File 4.3
.RCO PlayStation Portable Resource File 3.8
.RMT Router Firmware File 4.3
.RFW Rockchip Firmware File 4
.RC1 Samsung Mobile Device Firmware File 4.3
.PCK System Center Configuration Manager Package File 4.6
.PNF Precompiled INF File 4.8
.PDR Windows Port Driver 4.5
.PREFPANE Mac OS X System Preference Pane 4
.QVM Q Virtual Machine 4.8
.POL Windows Policy File 4.8
.PWL Windows Password List 4
.PAT DiskStation Manager Installation File 4.3
.PK2 Silkroad Online Game Data File 4.5
.PPD PostScript Printer Description File 4.4
.PFX PKCS #12 Certificate File 4
.NETWORKCONNECT Apple Network Connect Document 3.5
.PROFILE Bash Shell Profile 4.6
.PROP Android Build Properties File 4.5
.PS1 Microsoft Indexing Service Data File 3.4
.NT Windows NT Startup File 4.5
.NLS Microsoft National Language Support File 3.5
.NFO System Information File 4.7
.ODEX Optimized Dalvik Executable 4
.MSC Microsoft Management Console Snap-in Control File 4.5
.MTZ MIUI Theme 4.2
.MEM Parallels Desktop Memory Dump File 4
.MYDOCS Send To My Documents 3.5
.MUM Windows Vista Update Package 4.2
.NB0 Device Boot Loader Image 4.8
.MBR Master Boot Record File 4.5
.MSP Windows Installer Patch 4.3
.MLC Microsoft Language Interface Pack 4.8
.MAPIMAIL Send To Mail Recipient 4.5
.MANIFEST Windows Application Manifest File 4.5
.MUI Multilingual User Interface File 4.5
.MI4 Audio Player Firmware File 4
.LOG1 Windows Registry Hive Log File 4.5
.LOG2 Windows Registry Hive Log 2 File 4
.LOCKFILE Mac OS X PLIST Lock File 4
.LIBRARY-MS Windows Library Description File 4.3
.LPD Lookout Protocol Driver File 4.5
.LPD LPD Daemon Print Permissions File 4.2
.JPN Windows Japanese Noise-Word List File 3.2
.KEXT Mac OS X Kernel Extension 3.9
.KO Linux Kernel Module File 3.8
.KBD Keyboard Layout Script 3.5
.KS Kickstart File 4.2
.KOR Windows Korean Noise-Words List File 3.8
.LNK Windows File Shortcut 4.6
.LFS Samsung Phone params.lfs File 4.4
.LST GRUB Boot List File 4.4
.ION File Description File 4.8
.ICL Windows Icon Library File 4
.HSH Windows Catalog Search Index File 4
.ICNS Mac OS X Icon Resource File 4.7
.IM4P IMG4 Payload File 3.5
.IME Windows Input Method Editor File 4
.INTERNETCONNECT Apple Internet Connect Document 3.2
.HLP Windows Help File 4.2
.HELP Mac OS X Help Book 3.5
.H1S Windows Assistance Platform Help File 4.5
.IPTHEME IconPackager Raw Theme File 3.8
.IPOD Rockbox Firmware File 3.5
.ITS Internet Document Set 3
.IOPLIST Mac OS X IOPLIST File 3
.INF_LOC Windows Driver Information Cache File 4.5
.HTT Hypertext Template File 4.8
.HHK HTML Help Index 4.5
.HHC HTML Help Table of Contents 4.5
.HPJ Help Project File 4
.IDI EVA Controller Event Log 3.5
.ITEMDATA-MS Windows 8 Start Screen Item Data File 4
.IMG3 iPhone IMG3 File 4
.IUS InfoTMIC Firmware Update File 3.5
.FFX Microsoft Find Fast Index 4.2
.GROUP Windows Contacts Group File 4
.GMMP WCS Gamut Map Model Profile 3.5
.GRL Windows Update Status File 3.8
.GRP Windows Program Manager Group 4.1
.FL1 Lenovo BIOS Update File 3.5
.FID Microsoft Catalog Indexing Service File 4
.FTG Full Text Group 3.5
.FTS Full Text Search 4.2
.FFO Find Fast Document Properties Cache 3.5
.FFL Find Fast Document List 3.5
.FFA Find Fast Status File 4.2
.FLG Puppy Linux Partition Flag File 4.2
.FPBF Mac OS X Burn Folder 4
.EFIRES EFI Image File 3.8
.FX ReadyBoot Trace File 3.7
.DFU iOS DFU File 3.9
.DEV Windows Device Driver File 4.4
.ESCOPY ES Explorer Temporary File 4
.DIAGPKG Troubleshooting Pack File 3.2
.DIAGCFG Troubleshooting Pack Configuration File 3.5
.EMERALD Emerald Theme 3.5
.EDJ Enlightenment Theme File 4.5
.ELF Executable and Linkable Format File 4.2
.DLX Renamed DLL File 3.5
.DVD DOS Device Driver 4.6
.DESKLINK Desktop Shortcut 4.3
.DSS DCC Active Designer File 3.5
.DRPM Delta RPM File 4.5
.DMP Windows Memory Dump 4.6
.DIT Active Directory Information Tree File 4.8
.CAT Windows Catalog File 4.4