Did you make a Recovery disc with Acronis, or do you have the Acronis original disc - if you have either, then turn of your PC, insert the Acronis disc, restart PC, follow prompts. This is how to restore your saved OS image.
So as that you were trying to do f10, I am suggesting that you have a hidden partition, am I right? well if so which most likely answer is yes, then if notek's suggestion does not work then if it is possible, borrow an xp disk from a freind, or even maybe a later version if borrowing xp dvd is impossible, and boot to the cd, do startup repair, and it should give you an option to recover from your hidden partition. click here this will say what my win 7 disk done when doing startup repair. Different os's but should be basiclly same process. hope this is useful.
To Restore Image Boot with the Acronis CD. follow it through its easy just brows to the tib File on the Media you created it to then click on Restore point it to the correct Partition to restore to. Using this will lose any interim files you have not backed up