I installed the x64 version of Win 7. After that I modified the "*regedit*" and then changed the SATA selection mode to AHCI (which was in IDE mode before) in BIOS.

But;

1- One excessive icon has been appeared in bottom right-hand corner. When I click on it, a small window appears that says:

*Open devices and printers
Eject ST500DM002-1BC142 ATA Device (this is my HDD!)
- ...(C)
-....(D)
-....(E)*

I think it belongs to the HDD. How to get rid of it?

2- Should the settings of the BIOS (SATA selection mode) always be in AHCI and don't I need to return it to IDE even if I want to re-install the (x64 or x86) OS?