Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't work well with my Pentium 4

I bought this item for my Pentium 4 computer. When I partitioned to 80 GB and installed Windows XP, the system went extremely slow. Computer could start up but hung after 3-4 hour usage. I suspect the Hard disk is faulty or may be my PC is too old to handle a 640GB H/D. Later I bought a 320 GB from a retail shop and it worked perfectly.I returned this item but Amazon.com, handled the return professionally. I appreciate their service.