Tweak your win7 x64 to the max! Accelerate file system!
You have perhaps heard of disabling 8dot3 name creation on NTFS? Good. Did you knew that you can strip your disks, folders and files, including the system disk from 8dot3 names, which will accelerate your files system!
Run cmd with admin privileges, type: fsutil behavior set disable8dot3 1, then reboot.
Run cmd again with admin credentials and type: fsutil 8dot3name strip /f /s C:
Repeat strip for every drive/partition.