Run hijackthis and click on scan button and put a check next to these:
O2 - BHO: Nothing - {686a161d-5bd1-4999-8832-6393f41e564c} - C:\WINDOWS\system32\hp100.tmp (file missing)
O4 - HKLM\..\Run: [AlcxMonitor] ALCXMNTR.EXE
Nothing open but hijackthis and click on fix checked
Now reboot into safe mode by
tapping your F8 key upon restart and safe mode screen appears, select safe mode and press enter.
Navigate to these files or folders using Windows Explorer (OR Start -> Search) and delete (if present):
DELETE FILES:
ALCXMNTR.EXE
Reboot normal mode
As far as the other problem try this:
http://www.computing.net/windowsxp/w...um/134250.html
http://forums.techguy.org/t411210.html
Good luck, let me know how it goes