Added in an extra SATA 6Gbit/s SSD drive to my Windows 7 machine. Now two 6G/s SSDs - main one 64GB and this new 256GB. BIOS can see both. However when I run Windows 7 disk management tool it doesn't get past 'Loading disk configuration information' stage.
Also my external USB3.0 HDD now reads extremely slowly since I added the new SSD.
Any idea what's happening and how to fix?