something stange now

before i say apologize if myenglish not good,i`m from indonesia.
my note book installed OS windows 7
1 week it`s nothing seem happen
after that i`ve try a couple converter dvd software from www.tucows.com.www.cnet.com,tune up & registry software(winutilities),nero 9,firetune,firefox.opera turbo,then
right now my windows 7 have a problem:
1. my note book not normal sometimes too hot (not working only standby) sometimes normaly.(not ussualy hot)
2. my drive e:/cd/dvd drive sometimes workiing but when i`m not do anything or run any else for that drive e:.
3. my broadband network not too fast anymore.
i also try too fix from boot cd and diagnostic windows,but doesn`t fix that after i re install all again,it stabil agai just for 1 weeks,i hpoe the user who use this windows 7 more get atention of theese things,cos we all love windows 7 will be better more than others,thanks

thanks so much for the reply my post Myzr7,
after thats problems i`ve scanned with my kapersky anti virus2009(recommended from action center) that i`ve installed first software that i`ve finished installed the windows 7 rc,and before i begin surfing any website.
But there`s anything problems.then i run windows diagnostic from windows control panel and goto truobleshot panel, but there`s none erros report for my system.
now i try to install again,hope so it`s work.
if it`s really work,i think maybe i try too many software to test
drive this windows 7 rc.
Now i think i will backup fist before i`ve install 1 software to a disc,and after i`ve installed and update windows,then use to couple days i backup again to another disc,too knows what different effects,so perhaps i will know what realy software that`s make my windows 7 rc not optimize.
once again Thanks a lot Myzr7,"Terima kasih banyak"{indonesia language).