Difficulties after booting with a new OS

Difficulties after booting with a new OS

It's ASUS S56CM with UEFI firmware, x64-bit, Win8, i3 processor, 500gb
hdd(496gb and 4gb-marked as boot and 1Mb forgot what it was marked with) ,
24gb ssd(18gb and 4gb-marked as OEM partition), 4gb ram. The system used
to boot under 2secs and the desktop was responsive the next second. Only
HDD used to be visible in windows explorer. I installed Win8 PRO using
Windows Os disk as Win8 which was pre installed got corrupted. The first
difficulty was my disk wasn't recognised under UEFI. Rather I booted it
under BIOS and I wasn't able to install windows in any drive. The thing
was that Windows under BIOS cant be installed on GPT style drives. I used
gparted to convert GPT drives to NTFS drives and installed windows on my
hdd. Now with windows on hdd with 4gb hdd empty and idle, the ssd with
18+4 partitions are not in use, all my partitions including 4gb Hdd, 1Mb
Hdd, 18gb ssd, 4gb ssd are now visible in windows explorer and boot takes
3:27min with desktop responding after 2:26min. The Question is "How to
restore my device to its first state being 2sec instant on, while using
SSD??"