Windows are very slow, pop up wedsites from internet explorer

My computer became very slow, very time I click anything, it takes ages to get response. when I open internet explore, there are several web pages coming out apart from home page. most of the website are advertising, shopping and games web.
the operating system is Window XP home, and the internet connection is broadband, the kid at home downlaod some programmes and games from internet, more than 40GB space is used in the 80GB hard drive. I can not delete a icon on the desktop. How can I solve the problem?
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sunray_2003Connect With a Mentor Commented:
Looks like you are hit by spywares.. check these tools

Use spybot ,ad-ware ,CWshredder and post the log from Hijackthis here

After installing them, First Update them and then run

Spyware/Adware removal tools:

What is spyware :

SpyBot-S&D : 

Ad-aware : 


HijackThis : 

Pest Patrol :
step # 1. remove kids from using computer.
step # 2, follow sunrays advice and download spybot,ad-aware and cwshredder. Run all 3 they work better together.
step # 3, download zone alarm.
Step # 4, update anti virus. I noticed you did not mention that you even have one. If you dont then try AVG
lesmydadAuthor Commented:
Thanks, Sunray, after installed and ran Spybot, ad-aware and cwshredder, my computer is working fine now. but every time I restart computer, there is error message name "Rundll" on the desktop. the message is : Error loading c:\windows\system32\msiefr40.dll   the specified module could not be found.
Does anyone know what is "Rundll", how do I deal with it?
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Open the registry (click 'Start', choose 'Run' and enter 'regedit'), and find the key HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run. delete msiefr40.dll

lesmydadAuthor Commented:
Hi, akboss, I can not find msiefr40.dll
open regedit again.
click on the edit tab.
scroll to  "find" and click on it (could be find next)
insert msiefr40.dll  and click  find next.
when it finds a registry with that just right click and click on delete.

always make sure you back up the registry before you attempt to do anything in it.

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