WD 2 TB recognized as 1TB

Hello,
The problem is that the bios and opperation system windows 8 of my computer recognize my 2TB WD Purple disk as 1 TB. I try in to a another computer but the situation is the some.
Today I bоught new 2TB WD Purple disk the some as the first. The new one is recognized as 2TB in the disk management and in a bios. I change sata cables and ports too, but the problem is still present. Please help me.

LOL I fix the problem with program HDD Capacity Restore program. Now everything is fine.

I’m glad this has been resolved.