1: I can't move or copy, I can delete normally.
2: I tried all the three ways, and all of them fails! as of copy/paste & drag and drop, in the pasting process it stucks in the middle of the process, hangs for sometime then it asks me to either try again or to cancel the process. As of copying from command prompt it shows this message "data error cyclic redundancy check".
3: I used error checking when I right click on the hard drive then Properties then the Tools tab, then there is the option to check the hard drive for errors, and then I check the two options (A: Automatically fix file system errors, B: Scan for and attempt recovery of bad sectors). I did that twice, I started the process maybe on 7:30 am, and then I checked it on 5:00 pm and it hasn't finished yet, however I let it working, and it took a lot of time when it was processing through files, I mean at 5 pm it was 423 processed, then maybe after 1 hour it went to the next file (424 files processed), although some files didn't take too much time. Then maybe on 11:00 pm the explorer showed an error message and it asked me to restart, so I restarted it, and then all the error checking working just went away!
4: Media data (movies and music), photos and text files don't have any problem.
5: I haven't tried that actually, I will try it.
6: Yes, it happens on every other PC I tried
Anyway, I googled my problem, and I found this post on another forum, it's pretty much the same problem except for that my hard drive is always detected from any PC.