SLOW in normal mode, safe mode OK

I've been having problems w/ this WinXP pro pc lately - very slow.  I'll click on any app and it will take upwards of a minute to open.  If I click on a browser, ditto.  When the page does come up, it draws it gradually. This is a work PC and we have a T1 connection.  The PC is a Petnium III, w/ 512RAM.

It's NOT slow in safe mode though.

What I've done is formatted it (twice!)
I also check the task manager when I open a window and I don't see anything weird going on when I start any app/browser.

Some way I can narrow down to a driver or a service?
prondinaAsked:
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SheharyaarSaahilCommented:
Hello prondina =)

First try doing this and post back the results :)

How to perform a clean boot in Windows XP
http://support.microsoft.com/kb/310353
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prondinaAuthor Commented:
That seems to have fixed it - that's it? So, any clues on what it was or how to find out what it was:  startup or service - just  enable one at a time?  
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SheharyaarSaahilCommented:
>> startup or service - just  enable one at a time?
first try to enable the startup items back, one by one and check if problem starts again or not :-?
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