Hi, I know there must be a million such threads, but went through a few, since I saw no obvious solutions. I am running Windows XP Pro SP2, with the latest updates installed. My system was running fine, till about 2 months ago. Since then, every few times when I reach the windows login screen, if I typed in my password and tried to login when there was a lot of disk churning going on, the system seemed to hang. I would usually just cold-reboot at this point, since I couldn't figure out what the problem was. I suspected an HDD problem. However, last night I had left my system on to finish some downloads, with auto-shutdown. Since this morning, whenever I login, it takes about 5-6 minutes to login, and another 10 minutes to finish loading. I used msconfig to disable all startup programs to no avail. I've run a complete AV scan, run Spybot and Ad-Aware, scanned the disk using chkdsk /f /r, defragmented, but the problem still remains. How do I proceed to figure out what is causing the problem? Thanks a lot in advance! Edit: Also, I just remembered that for some strange reason, explorer.exe stops responding for a short while when I press a windows hotkey for an application. For example, if I've set Ctrl+Alt+Y as a shortcut for Y! Messenger, the first time I press the combo, explorer stops responding. The taskbar won't respond, the start menu won't respond, but other apps will continue normally. Also, I'd installed Kaspersky AV 6 a few months ago, and I've read that it can cause HDD problems.