My problem:
Every time I start Windows, everything seems to be working fine: It boots, loads the Windows welcome screen, I log in and my desktop appears as normal about a minute and a half after I hit the power button (Although I would like a shorter time, it isn't terribly long and is pretty consistent). The problem is that even though my desktop appears and I can access the Start Menu just fine, when I try to run certain applications, they take a really long time to appear, or they appear then immediately freeze for a long time (on the order of 10-15 mins, sometimes almost half an hour). After that period of time, all the things that had frozen or hadn't appeared show up immediately, and the computer is ready to go as normal and everything works fine. I had been living with this problem for a few months (I would just turn it on half an hour before I'd need to use it), but then I decided I needed to go ahead and reformat, thinking that would certainly fix it. Only one day after the reformat, the problem came back. Even after trying a couple of things (booting into safe mode or a diagnostic startup seems to fix it but I can't Identify any startup item that is the cause), I still have no idea what is causing it. I would greatly appreciate some help.
Examples of things that work (immediately after Startup):
Windows Explorer
Google Chrome
Skype
Examples of things that don't open/work:
Internet Explorer
Mozilla FireFox
All network connections/printer connections
Examples of things that freeze after opening:
Google Desktop
Windows Messenger
System Config. Utility (msconfig) after hitting Apply
...
System:
Microsoft Windows XP
Professional
Version 2002
Service Pack 3
Computer:
Intel(R) Core(TM) 2 Quad CPU
Q6600 @ 2.40GHz
2.39 GHz, 3.25 GB of RAM
Physical Address Extension
Graphics: ATI Radeon 2600XT
Audio: ATI Function Driver for High Definition Audio
Misc: Dell Monitor w/ Integrated Webcam