| Extension | Filbeskrivelse |
| .ADM | Systemfiler |
| .ADML | Systemfiler |
| .ADMX | Systemfiler |
| .AML | Systemfiler |
| .ANI | Systemfiler |
| .ANN | Systemfiler |
| .AOS | Systemfiler |
| .BK2 | Systemfiler |
| .BLF | Systemfiler |
| .BOM | Systemfiler |
| .CAB | Systemfiler |
| .CAT | Systemfiler |
| .CDMP | Systemfiler |
| .CHS | Systemfiler |
| .CHT | Systemfiler |
| .CI | Systemfiler |
| .CNT | Systemfiler |
| .CPI | Systemfiler |
| .CPL | Systemfiler |
| .CPQ | Systemfiler |
| .CPR | Systemfiler |
| .CRASH | Systemfiler |
| .CUR | Systemfiler |
| .DESKLINK | Systemfiler |
| .DIT | Systemfiler |
| .DMP | Systemfiler |
| .DRV | Systemfiler |
| .DSS | Systemfiler |
| .DYC | Systemfiler |
| .EFI | Systemfiler |
| .ETL | Systemfiler |
| .EVT | Systemfiler |
| .EVTX | Systemfiler |
| .FFA | Systemfiler |
| .FPBF | Systemfiler |
| .FTG | Systemfiler |
| .FTS | Systemfiler |
| .GMMP | Systemfiler |
| .GRL | Systemfiler |
| .GRP | Systemfiler |
| .HDMP | Systemfiler |
| .HELP | Systemfiler |
| .HHC | Systemfiler |
| .HHK | Systemfiler |
| .HIV | Systemfiler |
| .HLP | Systemfiler |
| .HPJ | Systemfiler |
| .HSH | Systemfiler |
| .HTT | Systemfiler |
| .ICL | Systemfiler |
| .ICNS | Systemfiler |
| .ICO | Systemfiler |
| .IDX | Systemfiler |
| .IMG3 | Systemfiler |
| .ION | Systemfiler |
| .IPOD | Systemfiler |
| Extension | Filbeskrivelse |
| .ITS | Systemfiler |
| .JPN | Systemfiler |
| .KEXT | Systemfiler |
| .KO | Systemfiler |
| .KOR | Systemfiler |
| .library-ms | Systemfiler |
| .LNK | Systemfiler |
| .LPD | Systemfiler |
| .MANIFEST | Systemfiler |
| .MAPIMAIL | Systemfiler |
| .MDMP | Systemfiler |
| .MI4 | Systemfiler |
| .MLC | Systemfiler |
| .MSC | Systemfiler |
| .MSSTYLES | Systemfiler |
| .MUM | Systemfiler |
| .MYDOCS | Systemfiler |
| .NB0 | Systemfiler |
| .NLS | Systemfiler |
| .NT | Systemfiler |
| .PANIC | Systemfiler |
| .PAT | Systemfiler |
| .PFX | Systemfiler |
| .PIT | Systemfiler |
| .PNF | Systemfiler |
| .POL | Systemfiler |
| .PPD | Systemfiler |
| .PPM | Systemfiler |
| .PREFPANE | Systemfiler |
| .PS2 | Systemfiler |
| .PWL | Systemfiler |
| .QVM | Systemfiler |
| .RC2 | Systemfiler |
| .RCO | Systemfiler |
| .REG | Systemfiler |
| .RMT | Systemfiler |
| .RS | Systemfiler |
| .RUF | Systemfiler |
| .SAVEDSEARC | Systemfiler |
| .SAVER | Systemfiler |
| .SBN | Systemfiler |
| .SCHEMAS | Systemfiler |
| .SEARCHCONN | Systemfiler |
| .SFCACHE | Systemfiler |
| .SHD | Systemfiler |
| .SWP | Systemfiler |
| .SYS | Systemfiler |
| .THEME | Systemfiler |
| .VGA | Systemfiler |
| .VGD | Systemfiler |
| .VXD | Systemfiler |
| .WEBPNP | Systemfiler |
| .WPH | Systemfiler |
| .XRM-MS | Systemfiler |
| .~NT | Systemfiler |
