I have a PC with a 20GB maxtor HDD which reported a missing windows system file.As a result ,i did a repair using a windows xp cd after which it said only 75% of the HDD is good and the rest is bad.But just after switching on the PC again it told me disk error and i shd press alt+ctrl+delete to restart .but still same thing happens.
Can any one kindly help me with any solution or let me know where i can get a free HDD repair software(pls note :-not only data recovery) to boot the drive and repair the bad sectors .Now it's saying i shd change the HDD and press any key .In fact, I cannot afford hard drive mechanic .

I got powermax from maxtor's website but it didnt work .

Thanks in advance .