I'm not sure you understand quite how serious that kind of error can be; if it's an indication of failing hardware, as seems possible, your drive is inevitably going to die and have to be replaced. You should buy another HD if you don't have a good one you can back up onto, copy over all the files you want (Usually the test software also has a drive mirroring function of some sort that you can use) and never rely on the defective drive for critical data again.

I have literally had drives that failed on the next boot after testing. It won't necessarily wait until you reboot either, it could happen at any time. HDs are relatively inexpensive and easy to install, so don't risk your data on one that's falling apart.

If you flat out can't replace it right now, at least find a way to make a good back-up. If you have good 'net speed there are a number of free online storage options (Like MediaFire) where you can back up your data. My experience with a drive that is going bad is that wiping it can make it last a little longer, but it's still going to die. Better to just replace it.