If SP2 is included with your new Dell PC, it cannot be uninstalled
or removed. Therefore, you cannot downgrade your system to SP1.

Using programs and hardware with Service Pack 2 (SP2)
http://support.microsoft.com/xpsp2swhw

Some programs 'seem' to stop working after you install Windows XP Service Pack 2
http://support.microsoft.com/kb/842242

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User
Microsoft Newsgroups

Get Windows XP Service Pack 2 with Advanced Security Technologies:
http://www.microsoft.com/athome/secu...xp/choose.mspx

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"John" wrote:

| The dell pc came pre-installed with sp2. I am having problem with one access
| app which uses internet transfer control to post to a web site and it does
| not work with sp2. All pre-sp2 pcs work fine. I have worked with an ISA
| server MS guy (as all pcs are behind and sbs2003/Isa 2000 server) and he
| thinks somehow sp2 is prohibiting the itc from sending user credentials to
| ISA server hence ISA server responds by 407 Proxy authentication required.
| Have spent a lot of time on both pc and server settings. Don't know what to
| do except downgrade the pc to sp1.
|
| Thanks
|
| Regards