To start with I’m not a XP expert.This is from information I Googled & put together.
I don’t have XP so I can’t test this information .I hope it helps.
Since you have already ran AV & antispyware scans it shouldn’t be those if the programs you used were able to find any virus or spyware on your OS.
For now I will assume they did & removed them.
Hopefully the original msconfig.exe can be restored from your OS.I would like to get rid of the downloaded one if possible.
So at what ever locations you placed the downloaded msconfig.exe replace it with the one that will be expanded into C:\WINDOWS\PCHEALTH\HELPCTR\BINARIES .
So here goes:
From an administrator command prompt type( you can copy & paste this):
EXPAND -r C:\ ServicePackFiles\i386\MSCONFIG.EX_ C:\WINDOWS\PCHEALTH\HELPCTR\BINARIES
I made this from the path you posted so make sure the MSCONFIG.EX_ file is in C:\ ServicePackFiles\i386,
You may have to :
Click on My Computer. Go to Tools > Folder Options. Click on the View tab and make sure that “Show hidden files and folders” is checked. Also uncheck "Hide
protected operating system files" and “Hide extensions for known file types” . Now click “Apply to all folders”.
Click “Apply” then “OK”.
If you don’t already have your files unhidden.Reverse to hide them again.
EXPAND -r C:\ ServicePackFiles\i386\MSCONFIG.EX_ C:\WINDOWS\system32\dllcache
In the C:\ ServicePackFiles\i386 I beleive the MSCONFIG will be a compressed file named MSCONFIG.EX_ .
Once it is expanded into the C:\WINDOWS\PCHEALTH\HELPCTR\BINARIES & C:\WINDOWS\system32\dllcache folders the file should be MSCONFIG.EXE or
any of these files may have small case letters so they may be msconfig.exe.Usually this doesn’t make any difference to the command prompt.
Now time to check the registry.
This should be the key:
In the right pane, next to Default, it should show:
As in image below.
I hope this does post if you need more explanation & if it fixes your msconfig.
If there is still a virus or spyware on your OS it will probably remove it again.Or prevent this from putting the msconfig.exe files in these locations.
If the MSCONFIG.EX_ doesn’t expand from the command prompt you may need to manually Extract it & do a copy & paste to the locations.