Its 2:00 here so I'll be brief and see if anyone has any ideas. If not I'll post more detail tomorrow.
I do a fresh install of Windows 7 and I have purchased a new hard drive as well as tried it on 2 others. After I do the install odd things happen like long pauses when opening windows like control panel, IE and others. The real trouble begins win I reboot the Pc it then runs a check disk and finds and removes errors. Each time it reboots, check disk and loads windows it takes longer and longer until windows will not boot. I've tried loading all the drivers and none of them. I loading Windows 7 via the disk.