A:
Yes, that is possible but you will need to keep the 5400 rpm for Dell Warrenty. You will need to do a clean install. STEPS:
1) Switch HDD
1a) find windows 8 ios from microsoft.
1b) install os to a flash drive or CD
2) go to BIOS and select flash drive or CD as 1st bootable drive
3) save and restart BIOS
4) format drive and install.