If one has a bunch of XP hotfix/updates then how can one batch install them all? I downloaded around 100 hotfix/updates using Windows Updates Downloader.

Ofcourse, there's about 3 pre-requisite files that needs to be installed first, but then I assume the rest can be installed in any order.

I remember there was a really good program (AutoPatcher) which can batch install. But my bunch of files are custom made (vanilla XP updates & SP1a updates... so AutoPatcher wouldn't work unless I know how to program AutoPatcher to work with my custom files?)

Batch files is not my best, but try this VBS script. Just place the script in the directory that you have

the updates located.

Save As InstallKB.vbs

 Dim Fso :Set Fso = CreateObject("Scripting.FileSystemObject")
 Dim Loc :Set Loc = Fso.GetFolder(".")
 Dim Obj
  For Each Obj In Loc.Files
   If InStr(Obj,"KB6") Or InStr(Obj,"KB7") Or InStr(Obj,"KB8") Or InStr(Obj,"KB9") Then
	CreateObject("Wscript.Shell").Run(Chr(34) & Obj & Chr(34) & " /S"),1,True
   End If 
  Next

Batch files is not my best, but try this VBS script. Just place the script in the directory that you have

the updates located.

Save As InstallKB.vbs

 Dim Fso :Set Fso = CreateObject("Scripting.FileSystemObject")
 Dim Loc :Set Loc = Fso.GetFolder(".")
 Dim Obj
  For Each Obj In Loc.Files
   If InStr(Obj,"KB6") Or InStr(Obj,"KB7") Or InStr(Obj,"KB8") Or InStr(Obj,"KB9") Then
	CreateObject("Wscript.Shell").Run(Chr(34) & Obj & Chr(34) & " /S"),1,True
   End If 
  Next

Wow, looks like you know your stuff! So all KB6/7/8/9 were for XP? and I could probably guess KB1/2/3/4/5 was for 98, etc?

Yes you could, I just started at KB6 because I think all updates for XP start at KB7.

Cool!

Is the /S near the end of the CreateObject line just a hotfix switch? Can I replace it with /quiet /norestart /nobackup?

Yes that just for the switch, you can use /quiet /norestart /nobackup or any other switches.

Yes a simple .cmd file is easy to do it. Example, i use :

hotfix.cmd :

@echo off
echo hotfix post SP3...
for %%a in (\\server\dir\hotfix\*.exe) do (
Start /wait "" %%a /passive /norestart /nobackup )