My Dell laptop over the last few months has terrible jumpy slow, fast typing. Acts like it's waiting then catches up. When writing emails in gmail, when ordering online...checking boxes etc. Called Costco Concierge and went through routines. Take out battery...go back in time before the problem started. All kinds of checks. After an hour of tries. I gave up went online and tried several other fixes. Nothing works.Before I get back online to concierge again... Any ideas? Dell Inspiron 17R, Intel Core i5-460M Processor,640 GB 5400RPM SATA HD, MS Windows 7. I do have McAfee security and am on Comcast broadband. I do not do anything fancy on this laptop. No gaming or downloading much.