If you ever clicked on Add/Remove Windows Components you probably noticed that some Windows programs can't be uninstalled. A good example is Windows Messenger. You should know that this situation can be changed. Locate the file sysoc.inf in \Windows\inf. Open the file with Notepad. The file should look something like this:

[Version]
Signature = "$Windows NT$"
DriverVer=07/01/2001,5.1.2600.1106

[Components]
NtComponents=ntoc.dll,NtOcSetupProc,,4
WBEM=ocgen.dll,OcEntry,wbemoc.inf,hide,7
Display=desk.cpl,DisplayOcSetupProc,,7
Fax=fxsocm.dll,FaxOcmSetupProc,fxsocm.inf,,7
NetOC=netoc.dll,NetOcSetupProc,netoc.inf,,7
iis=iis.dll,OcEntry,iis.inf,,7
com=comsetup.dll,OcEntry,comnt5.inf,hide,7
dtc=msdtcstp.dll,OcEntry,dtcnt5.inf,hide,7
IndexSrv_System = setupqry.dll,IndexSrv,setupqry.inf,,7
TerminalServer=TsOc.dll, HydraOc, TsOc.inf,hide,2
msmq=msmqocm.dll,MsmqOcm,msmqocm.inf,,6
ims=imsinsnt.dll,OcEntry,ims.inf,,7
fp_extensions=fp40ext.dll,FrontPage4Extensions,fp40ext.inf,,7
AutoUpdate=ocgen.dll,OcEntry,au.inf,hide,7
msmsgs=msgrocm.dll,OcEntry,msmsgs.inf,hide,7
WMAccess=ocgen.dll,OcEntry,wmaccess.inf,,7
RootAutoUpdate=ocgen.dll,OcEntry,rootau.inf,,7
IEAccess=ocgen.dll,OcEntry,ieaccess.inf,,7
OEAccess=ocgen.dll,OcEntry,oeaccess.inf,,7
WMPOCM=ocgen.dll,OcEntry,wmpocm.inf,,7


Games=ocgen.dll,OcEntry,games.inf,,7
AccessUtil=ocgen.dll,OcEntry,accessor.inf,,7
CommApps=ocgen.dll,OcEntry,communic.inf,HIDE,7
MultiM=ocgen.dll,OcEntry,multimed.inf,HIDE,7
AccessOpt=ocgen.dll,OcEntry,optional.inf,HIDE,7
Pinball=ocgen.dll,OcEntry,pinball.inf,HIDE,7
MSWordPad=ocgen.dll,OcEntry,wordpad.inf,HIDE,7
ZoneGames=zoneoc.dll,ZoneSetupProc,igames.inf,,7



TabletPC=tabletoc.dll,TabletSetupProc,Tabletpc.inf,HIDE,7


[Global]
WindowTitle=%WindowTitle%
WindowTitle.StandAlone="*"

Remove the word "HIDE" or "hide" from any application that you want to uninstall. Save the changes to the file. Now go back to Add/Remove Windows Components. You will notice that you can now uninstall those programs.