Powershell script to enumerate all system extensions from c:\windows
Results of system extensions frequency counts (I added % after)
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#get system file type counts $sysdir= "C:\Windows" $cntsfile= $env:USERPROFILE+"\Win7SystemFileExtsCnt.txt" try{ Get-Childitem $sysdir -Recurse -ErrorAction Ignore | WHERE { -NOT $_.PSIsContainer } | Group Extension -NoElement | Sort Count -Desc | Out-File $cntsfile } catch {} #get computers age as of last update $OS = Get-WmiObject -Class Win32_OperatingSystem $InstalledDate = $OS.ConvertToDateTime($OS.InstallDate) $Span = [datetime]::Now - $InstalledDate $age = New-Object DateTime -ArgumentList $Span.Ticks Write "Computer's age is: $($age.Year -1) Years $($age.Month -1) Months $($age.Day) days old" | Add-Content $cntsfile
Results of system extensions frequency counts (I added % after)
Ext Counts % === ====== ====== .dll 30800 25.54% .cat 19125 15.86% //(.cat) is packaged of an arbitrary collection of files .mui 10994 9.12% //Multilingual User Interface application resource files .mum 8987 7.45% //Windows update file .cdf-ms 6956 5.77% //A CDF-MS file contains the compiled version of a .MANIFEST file .exe 4316 3.58% .inf 3262 2.71% //Setup Information file is a plain-text file .ttf 3043 2.52% .GPD 2758 2.29% //GPD files are used for creating Unidrv minidrivers .sys 1882 1.56% 1705 1.41% .PNF 1340 1.11% //system-maintained configuration file that is created when an .INF file is run. .xml 1268 1.05% .man 1265 1.05% //short name for .manifest file .aux 1262 1.05% .mof 1224 1.02% .png 1120 0.93% .ini 1102 0.91% .PPD 814 0.68% .wav 793 0.66% .tmp 693 0.57% .nls 567 0.47% .fon 560 0.46% .txt 543 0.45% .chm 474 0.39% .ptxml 455 0.38% .dmp 413 0.34% .ps1 387 0.32% .admx 378 0.31% .adml 373 0.31% .log 371 0.31% .dat 363 0.30% .xrm-ms 360 0.30% .config 338 0.28% .H1S 320 0.27% .cur 312 0.26% .nlp 311 0.26% .tlb 309 0.26% .otf 307 0.25% .xsd 307 0.25% .compiled 292 0.24% .resx 270 0.22% .rtf 267 0.22% .cs 260 0.22% .jpg 252 0.21% .mfl 243 0.20% .icc 200 0.17% .msc 181 0.15% .EXP 172 0.14% .rat 168 0.14% .bin 165 0.14% .cpl 165 0.14% .efi 164 0.14% .gif 164 0.14% .sql 162 0.13% .ax 157 0.13% .h 147 0.12% .aspx 144 0.12% .DXT 130 0.11% .browser 124 0.10% .icm 120 0.10% .pf 116 0.10% .OCX 115 0.10% .psd1 113 0.09% .rs 108 0.09% .ps1xml 103 0.09% .bmp 102 0.08% .GDL 95 0.08% .tbl 94 0.08% .x32 94 0.08% .pdb 92 0.08% .htm 90 0.07% .sdb 86 0.07% .ico 82 0.07% .ins 78 0.06% .jtp 77 0.06% .cab 76 0.06% .emf 70 0.06% .IMD 69 0.06% .targets 69 0.06% .mib 68 0.06% .wmv 67 0.06% .bcm 64 0.05% .uce 64 0.05% .xsl 64 0.05% .iec 62 0.05% .cfg 59 0.05% .ime 58 0.05% .JS 50 0.04% .propdesc 49 0.04% .vbs 47 0.04% .ascx 44 0.04% .default 44 0.04% .rsp 42 0.03% .vdf 42 0.03% .web 42 0.03% .CMB 40 0.03% .html 40 0.03% .ttc 38 0.03% .css 37 0.03% .stl 35 0.03% .rom 34 0.03% .cmdline 32 0.03% .diagpkg 32 0.03% .err 32 0.03% .out 32 0.03% .uninstall 32 0.03% .com 31 0.03% .theme 29 0.02% .SCR 27 0.02% .avi 25 0.02% .acm 24 0.02% .dtd 24 0.02% .JSON 24 0.02% .master 24 0.02% .reg 24 0.02% .tsp 24 0.02% .etl 23 0.02% .ccu 21 0.02% .amx 20 0.02% .vp 20 0.02% .vrg 20 0.02% . 18 0.01% .hlp 18 0.01% .lng 18 0.01% .db 17 0.01% .CompositeFont 16 0.01% .dlm 16 0.01% .H1K 16 0.01% .ngr 16 0.01% .rll 16 0.01% .sep 16 0.01% .prof 15 0.01% .DIC 14 0.01% .wmf 14 0.01% .am 12 0.01% .ani 12 0.01% .comments 12 0.01% .drv 12 0.01% .inc 12 0.01% .nlt 12 0.01% .psm1 12 0.01% .rpo 12 0.01% .scp 12 0.01% .cmd 11 0.01% .NTF 11 0.01% .crl 10 0.01% .lex 10 0.01% .olb 10 0.01% .Tasks 10 0.01% .wma 10 0.01% .lnk 9 0.01% .old 9 0.01% .gmmp 8 0.01% .job 8 0.01% .lxa 8 0.01% .mlp 8 0.01% .rld 8 0.01% .sdi 8 0.01% .url 8 0.01% .cmf 7 0.01% .jnt 7 0.01% .tmp-tmp 7 0.01% .toc 7 0.01% .Wdf 7 0.01% .bat 6 0.00% .cap 6 0.00% .cch 6 0.00% .cpx 6 0.00% .ds 6 0.00% .mid 6 0.00% .mpg 6 0.00% .res 6 0.00% .shp 6 0.00% .win32manifest 6 0.00% .GRM 5 0.00% .16385 4 0.00% .camp 4 0.00% .cdmp 4 0.00% .CHS 4 0.00% .CHT 4 0.00% .cov 4 0.00% .cpa 4 0.00% .cty 4 0.00% .cw 4 0.00% .dcr 4 0.00% .dir 4 0.00% .dls 4 0.00% .dun 4 0.00% .dvd 4 0.00% .dvr-ms 4 0.00% .fe 4 0.00% .frm 4 0.00% .h1c 4 0.00% .H1T 4 0.00% .hex 4 0.00% .iso 4 0.00% .isp 4 0.00% .jpn 4 0.00% .jrs 4 0.00% .kor 4 0.00% .mllr 4 0.00% .mp4 4 0.00% .msi 4 0.00% .obe 4 0.00% .phn 4 0.00% .prx 4 0.00% .ps 4 0.00% .psc1 4 0.00% .psd 4 0.00% .smp 4 0.00% .tbr 4 0.00% .THA 4 0.00% .uni 4 0.00% .vb 4 0.00% .vs 4 0.00% .wmz 4 0.00% .wsc 4 0.00% .wwd 4 0.00% .xbap 4 0.00% .xsx 4 0.00% .csv 3 0.00% .ebd 3 0.00% .idx 3 0.00% .mp3 3 0.00% .ser 3 0.00% .acl 2 0.00% .blb 2 0.00% .BPD 2 0.00% .BUD 2 0.00% .chk 2 0.00% .clb 2 0.00% .dcf 2 0.00% .desklink 2 0.00% .devicemetadata-ms 2 0.00% .dnl 2 0.00% .doc 2 0.00% .dub 2 0.00% .ecf 2 0.00% .fl 2 0.00% .fx 2 0.00% .GRL 2 0.00% .hit 2 0.00% .hkf 2 0.00% .HPI 2 0.00% .hrd 2 0.00% .hxx 2 0.00% .ird 2 0.00% .LOC 2 0.00% .mapimail 2 0.00% .msstyles 2 0.00% .org 2 0.00% .OverrideTasks 2 0.00% .pb 2 0.00% .pdf 2 0.00% .prm 2 0.00% .properties 2 0.00% .props 2 0.00% .qtp 2 0.00% .qts 2 0.00% .qtx 2 0.00% .que 2 0.00% .rrr 2 0.00% .s3 2 0.00% .stp 2 0.00% .t4 2 0.00% .uns 2 0.00% .vch 2 0.00% .XEX 2 0.00% .xpi 2 0.00% .xst 2 0.00% 0 2 0.00% 0.1 2 0.00% 0.10165524 2 0.00% 0.106033 2 0.00% 0.1079901 2 0.00% 0.1083426 2 0.00% 0.10917137 2 0.00% 0.11277624 2 0.00% 0.12913793 2 0.00% 0.1371903 2 0.00% 0.139199 2 0.00% 0.144727384 2 0.00% 0.1496361 2 0.00% 0.2061428 2 0.00% 0.2176416 2 0.00% 0.25691211 2 0.00% 0.27929935 2 0.00% 0.2799157 2 0.00% 0.29565683 2 0.00% 0.29599 2 0.00% 0.3285044 2 0.00% 0.3397998 2 0.00% 0.35809623 2 0.00% 0.3822664 2 0.00% 0.4026523 2 0.00% 0.4058614 2 0.00% 0.4181747 2 0.00% 0.42556121 2 0.00% 0.43410679 2 0.00% 0.449033 2 0.00% 0.45415385 2 0.00% 0.52254527 2 0.00% 0.5814079 2 0.00% 0.601773 2 0.00% 0.6051029 2 0.00% 0.6179558 2 0.00% 0.6812641 2 0.00% 0.7166873 2 0.00% 0.7263375 2 0.00% 0.7559434 2 0.00% 0.762213 2 0.00% 0.786571 2 0.00% 0.8922087 2 0.00% 0.89321288 2 0.00% 0.910531 2 0.00% 0.95783 2 0.00% 0.975474 2 0.00% 0.9903645 2 0.00% .01cad04b30e6c1f8 1 0.00% .01caf13786f95966 1 0.00% .01cb07fce6f4def3 1 0.00% .01cbc8bc3c502f9d 1 0.00% .01cbde138c673079 1 0.00% .01cbf98efc018851 1 0.00% .01cc061e0207fe70 1 0.00% .01cc061e7b4627fd 1 0.00% .01cc10096d9577dd 1 0.00% .01cc1009cd04e555 1 0.00% .01cc2cafb47f7f25 1 0.00% .01cc366609526398 1 0.00% .01cc43435e83bc45 1 0.00% .01cc4343b4f5c6a7 1 0.00% .01cc43a8ef1e5f83 1 0.00% .01cc43af693564d0 1 0.00% .01cc43afb503df66 1 0.00% .01cc43b8b32a8a54 1 0.00% .01cc43b90803edd2 1 0.00% .01cc4400c9ea5a90 1 0.00% .01cc440419f25b98 1 0.00% .01cc449c6ea0256c 1 0.00% .01cc44a2be60cbf0 1 0.00% .01cc44c572f49e8d 1 0.00% .01cc4542bdca9e7c 1 0.00% .01cc454af005b30c 1 0.00% .01cc454b3545c85c 1 0.00% .01cc460965267b1b 1 0.00% .01cc46143d5c1503 1 0.00% .01cc4614a91661e6 1 0.00% .01cc46d8c40504e4 1 0.00% .01cc46df33556595 1 0.00% .01cc46dfa5b64a8d 1 0.00% .01cc47aaf31a8b9e 1 0.00% .01cc487230e7398e 1 0.00% .01cc4ad0b8666299 1 0.00% .01cc4b9497b5ea61 1 0.00% .01cc4c644032dc07 1 0.00% .01cc4d2edee8ed9e 1 0.00% .01cc4d4c95948401 1 0.00% .01cc4df8a29b8a69 1 0.00% .01cc4f97e9963f11 1 0.00% .01cc505c148fcf9a 1 0.00% .01cc5106d19d44e0 1 0.00% .01cc5117dbacd143 1 0.00% .01cc5118446ffb80 1 0.00% .01cc51228d186b38 1 0.00% .01cc5761a1913c7f 1 0.00% .01cc88f886d56bf3 1 0.00% .01cc9f3c273aed31 1 0.00% .01ccbb437a7d323d 1 0.00% .01ccd069f917befe 1 0.00% .01ccdb7938594e57 1 0.00% .01ccecb73fd30c50 1 0.00% .01ccfe10bf065228 1 0.00% .17514 1 0.00% .ADM 1 0.00% .APL 1 0.00% .asp 1 0.00% .bak 1 0.00% .bcf 1 0.00% .chr 1 0.00% .CON 1 0.00% .crmlog 1 0.00% .CRT 1 0.00% .CSD 1 0.00% .Deployment 1 0.00% .edb 1 0.00% .ev1 1 0.00% .ev2 1 0.00% .ev3 1 0.00% .EVM 1 0.00% .fxh 1 0.00% .gs 1 0.00% .hhc 1 0.00% .hhk 1 0.00% .hve 1 0.00% .lic 1 0.00% .LTS 1 0.00% .mif 1 0.00% .mni 1 0.00% .MPP 1 0.00% .MST 1 0.00% .mzz 1 0.00% .policy 1 0.00% .PPTX 1 0.00% .PUB 1 0.00% .sam 1 0.00% .security 1 0.00% .ses 1 0.00% .SHD 1 0.00% .soundpack 1 0.00% .SPL 1 0.00% .tif 1 0.00% .trx 1 0.00% .tsi 1 0.00% .TTS 1 0.00% .txt44A40B10-65CC-094C... 1 0.00% .UDT 1 0.00% .UNT 1 0.00% .WIH 1 0.00% .WIM 1 0.00% .wsf 1 0.00% .wtv 1 0.00% .XLSX 1 0.00% .ZFSendToTarget 1 0.00% 0.001 1 0.00% 0.002 1 0.00% 0.003 1 0.00% 0.004 1 0.00% 0.005 1 0.00% 0.10461536 1 0.00% 0.10533967 1 0.00% 0.1292296 1 0.00% 0.13285 1 0.00% 0.13718556 1 0.00% 0.1405288 1 0.00% 0.14254232 1 0.00% 0.14254263 1 0.00% 0.167389 1 0.00% 0.174178735 1 0.00% 0.17803239 1 0.00% 0.17803255 1 0.00% 0.19404605 1 0.00% 0.2 1 0.00% 0.2046951 1 0.00% 0.2046967 1 0.00% 0.2227912 1 0.00% 0.22733011 1 0.00% 0.23230623 1 0.00% 0.26146625 1 0.00% 0.26146641 1 0.00% 0.28082519 1 0.00% 0.28082551 1 0.00% 0.28379967 1 0.00% 0.28379998 1 0.00% 0.298835 1 0.00% 0.3 1 0.00% 0.30507196 1 0.00% 0.30507212 1 0.00% 0.3099874 1 0.00% 0.3323866 1 0.00% 0.3549553 1 0.00% 0.3609051 1 0.00% 0.36226255 1 0.00% 0.36226583 1 0.00% 0.37110625 1 0.00% 0.38856432 1 0.00% 0.38856448 1 0.00% 0.39093569 1 0.00% 0.391765 1 0.00% 0.4 1 0.00% 0.4183291 1 0.00% 0.437894 1 0.00% 0.47845 1 0.00% 0.47876 1 0.00% 0.48844412 1 0.00% 0.50275971 1 0.00% 0.5114928 1 0.00% 0.52039609 1 0.00% 0.52884151 1 0.00% 0.52884198 1 0.00% 0.55739516 1 0.00% 0.5624569 1 0.00% 0.56799012 1 0.00% 0.58400705 1 0.00% 0.58400752 1 0.00% 0.637903 1 0.00% 0.654845 1 0.00% 0.68749 1 0.00% 0.7006 1 0.00% 0.771799 1 0.00% 0.77724986 1 0.00% 0.783764 1 0.00% 0.80246 1 0.00% 0.85348 1 0.00% 0.85769 1 0.00% 0.8586653 1 0.00% 0.8586669 1 0.00% 0.87563 1 0.00% 0.90917 1 0.00% 0.916817 1 0.00% 0.93912 1 0.00% 0.9757269 1 0.00% 120572 100% Computer's age is: 7 Years 8 Months 17 days old
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