Re: To upgrade or not to upgrade? That is the ?
F15 will be eol before you can upgrade.
F16 will not boot on you PentIV untill a way newer kernel is installed.
F17 will break your system most likely.
grub2 may screw up your dual boot on windows.
Keep what you have for New Windows 8 and get a new Linux machine (Intel i7 with newer vt teckknlowlogy, 6 ddr3 slots, usb2/3, sata2/3, newer video, monitor, printer, scanner, cam, sound&speakers, TV monitor.
Thne you'll be set for the 20teens.
Do the Math