i5 2500, 8GB ddr3, GT440 1gb vga, AsRock B75 Pro 3 mobo...WD 750 and 1TB sata drives. I had Windows 7 x64 running for nearly a year, with no problem. Security Essentials + Comodo firewall. The only "problem" I had after a while was sluggish boot, lots of HDD grind on startup, and way too slow for amount of free space on all of my drives, including the system. So, I'm about to reset and format it all. This is my hdd setup; HD1: Partition C - 100 GB - mainly Windows only Partition D - 300 GB - photos, programs, videos, music Partition E - 300 GB - photos, programs, videos, music HD2: Partition F - all one partition, 1TB, all kinds of files. I backed up everything from HD1, the C, D and E partition, so I'm thinking of rearraging that disk to make Windows, and my programs (mainly Adobe software, Premiere, After Effects, Photoshop, some 3D software) run swiftly. It shouldn't be any problems with formatting the first drive, right? Drive 2 shouldn't be affected? How could I optimize the drive to make Windows 7 x64 perform as fast as possible on my current computer?