KC-Alen

i'm sure its a hardware problem, the answer to the question about why u can't reach F, and you do can reach the other is because the sector used for the F partition is not good anymore, or your powersupply isnt good, or it does not give enough power.

To check if you got enough power for your computer, post your specs (amount of harddrives, dvd reader/writer, whatever you name it, just name it media reader), and also what kind of graphic card you got en how many slots of ram you used and how many pci card you got etc etc, and the most important how many Watts your power supply is.

KC-Alen

Btw if it really is your harddrive problem (sector) you should replace your harddrive as soon as possible if you got important files on the other partitions etc. your other 2 partitions might still work now, but not for long, so i would recommend you not to use that harddisk anymore if you are going to use it to save important files/data's etc.