I have upgraded from XP Home to XP Pro, after that i started getting problems with MS Outlook and IE

I have upgraded from XP Home to XP Pro, after that i started getting problems with MS Outlook and IE, i'll put in SL. order

1) when i open IE it opens the home page which is google, but if i type any other address it gives me this message (The request lookup key was not found in any active activation context)

2. I have put my e-mail settings in MS Outlook as given by my e-mail provider , the outlook is also not working giving some error message. am not sure if this is something related to upgrade i have made, so can anyone help me out in fixing the problem.

thanks

I have upgraded from XP Home to XP Pro, after that i started getting problems with MS Outlook and IE?microsoft exchange

If you have CCleaner I would recommend running it to find the problems and clear your registry. You probably have double entries and entries that are not needed and that's what is causing the errors and hang ups. If you don't have it you can download it for free.

I have upgraded from XP Home to XP Pro, after that i started getting problems with MS Outlook and IE?windows vista ultimate internet explorer

Do fresh install.