Either the other three responders (at the time I started typing this)
MISSED what you said or ignored it.
SP1 and SP1a - which you are comparing - are only SLIGHTLY different.
It was due to some legal action and crud I will not go into.
Microsoft explains this (not the crud, but the differences)
sufficiently well here:
Differences Between Windows XP SP1 and Windows XP SP1a
http://support.microsoft.com/?kbid=813926
The thing to notice is this line, which is the "final word" on the
differences:
"Windows XP SP1a is the same as Windows XP SP1 except that the
Microsoft virtual machine (VM) is removed in SP1a."
Now, Cerridwen told you that SP1 is available for download, but.. I
cannot tell you from where. Perhaps Cerridwen can enlighten as to
where this is - it most certainly won't be a Microsoft web site, so I
doubt I would download it (just for security reasons. *grin*)
Cari pointed out this link:
http://www.microsoft.com/WindowsXP/pro/downloads/servicepacks/sp1/default.asp
And is correct - that is SP1... SP1a. As you already mentioned, and
is not really what you were asking about - as I sense from reading
your post you want to know if you should bother trying to find SP1
somewhere or just download SP1a and continue on your merry way...
Scott M. happily pointed out that SP1 will be available as long as XP
is available and can be found here:
http://www.microsoft.com/WindowsXP/pro/downloads/servicepacks/sp1/default.asp
Again, yes and know - as you seemed to point out SP1 and SP1a and
everyone is just pointing you to SP1a.
Your question is answered in the first part of this response.
Essentially - the difference is small. Download it and go on your
merry way. I have continued using a copy of SP1 I grabbed before SP1
came out. But if you can only get SP1a, do it.. Look for the
Microsoft virtual machine (VM) elsewhere, download it and install it
and you have - strangely - reverted back to SP1. heh
Seriously, however, if SP1 (NOT SP1a) is available at some reputable
place - I don't know about it and it would have to be REALLY
reputable for me to trust in getting it.