Hi guys, Hopefully you’re the expert. I have bought system with following configurations and built it myself. Intel Core i7 3820 Desktop Processor - BX80619I73820 Arctic Cooling Freezer i30 CPU Cooler Antec TruePower TP-550 550W Power Supply G.Skill Sniper 16GB Memory (F3-12800CL9Q-16GBSR1) HIS Radeon HD 6670 Video Card (H667FS1G) Asus P9X79 Motherboard Corsair Force GS SATA 240 Gb hard drive Windows 7 It worked well for couple of month but Appears as a pop up window on the bottom of the screen: Intel rapid storage technology enterprise SATA available disk: Removed at that time PC freezes for few seconds, then Sometimes it appears that it is “Connected” or "Intel rapid storage technology enterprise SATA disk on Controller 0, port 0: Detected" I went through BIOS it seems all ok, tried to change settings to RAID but windows did not load at all Currently set for AHCI (i think) Also i tried to to run scan disk in windows but it would not do it on the reboot, some errors come up.... I mainly do my work on Mozilla- cloud based apps and also Outlook 2010- that’s actually makes PC to freeze. Device manager shows everything OK After rebooting PC few times Outlook gave up on me- won’t start. Tried to uninstall/ install it again but does not work. Now- I try to run Outlook- it won’t open, however I can see that PC is affected, even though I can move opened windows on desktop I cannot open new folders Then by pressing Shut down – have to wait about 5 min for it to happen… Update 1- checked all cables as per below post, all OK but nothing changed... system still crashes also did run a SeaTools- none of the test could be performed- they failed, only managed to run Short generic test- Passed Update 2- tried to change cables around. then successfully run Scan disk! But still RST gives me message that drives disconnected... Computer generally runs ok But my main issue that I am not able to use Outlook- main work software I went to “Intel rapid storage technology enterprise” but it shows that everything is functioning normally. What do I do???