My laptop keyboard has a couple slight problems with it.

First, if I'm typing a long string of letters, the computer may stop for a second, then process my commands.  However, it will repeat the last few letters I typed, multiple times.  For example, if I typed "I eat eggs," it may come out with "e ggs eggs" (the space is generally recognized in the correct place).

Second, once in a while, my keys will completely forget their jobs.  When using a word processor, I will once in a while end up having all keys randomly start counting, typing 012345678901234567890, until I switch pages for a minute.

Third, my keyboard's utterly useless on flash games. 

Any suggestions for fixing it?  I've done virus and spyware scans for a while, and never found anything.  This problem has been going on since I bought the laptop (new).