ok so im not the brightest when it comes to older products out there. But ok my mom has this gateway desktop computer that is 10 years old and so i believe the hard drive died the other day, i wanted to get her a new hard drive so i guess my question being, the one that she had was an ATA, can i just replace that one with any other ATA drive? or PATA drive? then also she said she can't even update adobe reader to the newest she can only go as far as 7.0 because of the cpu, what do we recommend? she only uses the computer for internet, email, and tax stuff.