Sorry, I have been untimely at responding, but have had some family health emergencies
--Yes, it's an upgrade from XP Home to XP Pro
--No, it's not a dual boot
--No, MS Firewall is not enabled, we use McAfee Firewall but it is currently not enabled
--This is at work, and of course I use Mozilla at home ...
Interestingly enough, these are HP Pre-loads so here's what fixed it
--I F10 re-booted to restore the disk to its original out of box state, complete with junk
--I stripped the disk to OS, drivers, McAfee VirusScan & Firewall, and some utilites
--created c:\HP SaveC\ off the root of c:
--created c:\HP SaveD\ off the root of c:
--copied the entire c: drive into c:\HP SaveC\ and d: into c:\HP SaveD\
--created c:\WINPro
--Re-Installed XP Pro into c:\WINPro\
--Upon re-boot, as expected, it displayed the "dual boot menu" with choices being "... XP Home" and "... XP Professional"
--Selected XP Home
--Now, there are 2 sets of users in C:\Documents and Settings\
--1st Set is for XP Home .... owner, default, all users etc
--2nd Set is for XP Pro .... owner.A1MAIN, default.A1MAIN, etc
--A1MAIN=machine name
--Copied c:\Documents and Settings\default.A1MAIN\*.* to C:\Documents and Settings\default\*.* overwriting all, continued this for each directory in docs and settings, then renamed *.A1MAIN to *.Pro (this was time consuming)
--Copied c:\WINPro\*.* into C:\windows\*.* overwriting only drivers
--Deleted c:\WINPro
--Re-Booted and again there was a "dual boot menu" selected XP Pro
--Back to C:\Documents and Settings ... deleting and renaming
--Edited boot.ini by 1st deleting all references to XP Pro then changing all "XP Home" text to "XP Pro"
--Ran some registry utilities and did some manual editing removing "XP Home" text
--Back to C:\Documents and Settings ... deleting all *.A1MAIN (which are un-used now)
--Re-Ran some registry utilities and did some manual editing
--copied the entire c: drive into c:\HP SaveC\ and d: into c:\HP SaveD\
--Life is almost good again!
--Loaded Microsoft XP SP1 CD, .NET stuff, Microsoft IE6 SP1 CD, and re-installed utilities
--Loaded McAfee ASAP Service
--Re-booted and Now Life is good again ... for now
--Seems quite peculiar that with lots of time and thought one is able to spoof the OS this simply ... I have attempted to list out the steps I used sequentially, but its likely that there will be uniqueness for most machines that may require something different along the way.
--Please DO NOT assume these steps will work exactly as outlined above for your configurations, and of course follow them at your own risk!! I will certainly NOT accept any responsibility for anyone that chooses to follow the above instructions!!
robin