Windows 7, Deleting Large files is extremely slow. (Not going to recycle bin, permanent delete)

It is taking a huge amount of time to delete files.

The files are not going to recycle bin (I am hold shift while hitting the Delete key)

Also I have even tried shutting off the recycle bin

I have timed a few of these

Single file delete, 2.6 gb, 2 minutes 14 seconds

Single file delete, 1.9 gb, 1 minutes 44 seconds

Single file delete, 230 mb, 0 minutes 24 seconds

Most of the time the dialog window that pops up says "Calculating..."

Judging by the times, This has something to do with file size.

I get similar time when I delete from the command prompt.

Windows XP would do permanent deletes and moves (on the same drive) in a split second, especially since we are talking about one file.

I work with large image files regularly. I can't wait 2 plus minutes every time I delete one of these files when I may have to move or delete a few hundred at a time.

I am getting very frustrated with Windows 7.

So far...

I have disabled Remote Differential Compression (RDC)

I have disabled TCP AutoTuning and Receive Side Scaling

                netsh interface tcp set global autotuninglevel=disabled (AND)

                netsh interface tcp set global rss=disabled  (And rebooted)

There are no removable drives, USB devices, or other attached devices other that the keyboard and mouse.

I have disabled

Windows Search and Indexing

I am viewing "Details" only in windows explorer (No Thumbnails)

I have shut off IPv6 support (I read about it somewhere but I believe it was to do with network operations, but I tried it anyway)

Teredo Tunneling Pseudo-Interface is disabled

All Drivers are up to date.

I have completely wiped the drive and reloaded the OS.

This is on a 1tb storage drive, no RAID, 3gb SATA drive (Seagate 7200.12)

Windows 7 64bit (Windows experience is listed as 6.1)

Intel i5 processor with 4gig memory

Fresh install, fast hard drive (OS).

Avast AV

Not much else running