computer help

And I thought I had it sorted

In short (as possible)....

*My original IDE drive started to pack in.
*I bought a 160GB SATA drive and controller card.
*Couldn't get XP (or Linspire & Ubuntu) to install on that drive.
*Managed to clone the dying IDE drive over, but took forever to boot up and would constantly freeze.
*Gave up and borrowed a laptop.
*Laptop worked one night fine, then in the MOrning when trying to turn it back on, the screen doesn't seem to want to come on and it doesn't seem to be booting up properly (ideas on this would be appreciated too).
*Borrowed a 2GB IDE drive off a mate and installed XP on that.
*Formated (quick) the SATA drive and used that for storage and the paging file - whatever that means (thanks Paul ).
*Worked fine

Started up the machine today and just after the scrolling bar type windows screen, a blue screen disc checker thing started. Checked three things and said all were ok. Failed to proceed from there after 5 min's so restarted.

This time I told it to cancel the check, and it loaded windows as normal.

However, when trying to access F drive I get...

F:\ is not accessible.

The disk structure is corrupted and unreadable.

Both drives show as Healthy and online in disc manager.

Ideas???