problem with my laptop

i have a 6 month old HP laptop.its HP pavilion dv6113us.in the past 2 days i came across 3 problems.thhey are 1.the wireless internet connection is wierd,it doesnt work automatically when i switch the laptop on,the connection has to be repaired and the laptop shud be restarted to work the internet.
2.the audio once was not possible to hear.i mean the audio system failed and my friend went to Administrative tools and services and did somethinf is audio and then it started working.but i worry somethings wrong is going.
3.and actually this was the first thing i noticed,the theme changes to some windows 98 theme..when i opened an internet browser,the toolbar at the bottom and Firefox theme looked like a windows 98 theme roughly and then after awile it changed back to normal.
The bottom 2 probs are nt big but internet problem is kinda a worry,to those who know the solution to this big list,please let me know how to solve it...thanks a ton.