I have to say i'm fairly novice at this, but i am willing to learn.
Basically my PC randomly stopped working - I got disk read error. After trying to reinstall windows, and getting more errors (cannot format disk may be damaged).. It completely stopped being recognized by the system, so i'm guessing i got HDD failure.
So ultimately that's the priority at the moment, getting it up and running again.
I also should ideally get a new case, as the power button is inconsistent. (if i turn it off, i have to wait about an hour before i can turn it on again.. really weird).
It's an old PC, so i am open to upgrading some parts, but currently i only have max 300 to play with, and would like to at least fix this disk read error with that. i get more money in a months time as well, so can upgrade more then.
Your hard drive probably needs to be replaced. If you have a spare computer try throwing it in that one and doing a virus scan, then routine maintenance on it (defrag it and check for errors).
If you can go into bios you can set your boot drive to your CD/ROM. Throw your windows disk in and try repairing windows. If you have a spare HD try installing windows on that one. If not… here is a link to get an inexpensive drive: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
These are usually cast offs from corporate and government that have been refurbished, but I have had very good luck with them. They are fast and cheap and work 90% of the time. They are cheap, buy two.
There is nothing wrong with the drive you have on the link, but I prefer to put OS on a smaller drive and use that drive for only the OS. For installs other than the OS open a Program files(X32) folder on your second (larger) drive and install them there. Steam installs, music/movies/photos can go there as well. That way if you download something you shouldn’t have… accidentally… you haven’t corrupted your OS drive. Sets you up for a SSD later on, same practice.