Hey....
I am using a Laptop, one day old...trying to make a back up of original setup I get into this, and now I can't do anything.
Also the laptop uses SATA drive and no floppy drive.

I tried what iamnobody said
and when doing
example:gdisk 2 /act /p:x /i (set partition x on disk 2 active (your Windows partition))

Actual: gdisk 2 /act /p:2 /i

I get
GDISK (W) Fixed disk 1 has overlapping drives
GDISK (E) No Such fixed disk -- 2