RAM Not working properly and files not deletes (2 in 1)

Question

Hello. Ive installed 6Gb of ram on my iMac, and system shows all 6. But in-use only 2. When im restarting computer, its works normaly, but when trying to open any default app - 4gb disappears =( U can see this on screenshot here: http://photo.vibos.org/#287 ... How can i fix this? And why its happening?
And second problem:
ive deleted some files from external hdd to trash and now cant empty her =(
when im clicking on "empty" or "safe empty" my CPU and RAM uses for 100% and then computer freezes. cant understand how delete this files from trash =(
hdd is SATA, 1Tb and used before in windows, so its has ntfs file system. om my mac im using paragon ntfs as active solution and mac fuse as secondary, not active rigth now.
Thx 4 help and sry f
P.S.: om my mac book i cant install photoshop because i have extended fs with registry (or some like that). how can i change fs type or install ps on other partition of hdd?

Answer 1

The machine has a 1 year warranty, book an appointment with your local Apple Store or AASP to have it looked at.
You can try doing a SMC reset however I don't think that is the solution.
SMC RESET
• Shut down the computer.
• Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
• On the built-in keyboard, press the (left side) Shift-Control-• Option keys and the power button at the same time.
• Release all the keys and the power button at the same time.
• Press the power button to turn on the computer.
PRAM RESET
• Shut down the computer.
• Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
• Turn on the computer.
• Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
• Hold the keys down until the computer restarts and you hear the startup sound for the second time.
• Release the keys.