longshot - do you have two antiviruses installed? if so uninstall one.
chkdsk/r (press enter)
How long is the boot?
Do you have any Hauppauge TV cards?
Do you map any network drives?
Disable any unused network adapters. This will add to the boot time while the system looks for a network on that adapter.
Have you tried a clean boot?
C: 206 0f 284 Free (it is a 320GB drive)how big is the hard drive and how much of it are you using?