When i open IE a crytical error window opens and it says?

"Your browser was hijacked by Trojan.Win32.Agent.akk

You need to clean your system immediately, in other case it can be crashed soon!

Click OK to download the high-tech antispyware protection software! (Recommended)"

why is this? and the "high tech" antispyware software is IE Defender and thats not a good thing either i just got that off my computer while this was going on what should i do?

When i open IE a crytical error window opens and it says?windows server 2003

You have a Trojan

No antivirus or antispyware protection is perfect, not even the expensive ones but a good mixture will help you clean your system and hopefully keep it clean. It is advisable not to run two or more anti virus applications.

For starters, download, update and run a full scan using the following product:

http://www.superantispyware.com/

SuperAntiSpyware is exceptional and will remove the majority of difficult Trojans and Worms, not just the easy ones.

If possible it is recommended that you load the application in normal mode but run it in Safe Mode. Safe Mode can be started by continually pressing F8 during the boot sequence. However, if you are badly infected you might need to run SuperAntiSpyware more than once to help clean your system. If the only infections now being shown are in System Restore, once you are completely satisfied that you can boot normally, you can either delete the infected restore points manually, or temporarily turn off System Restore.

In addition download, update %26amp; run Avira. Unlike a lot of the free antivirus applications this will give you real time protection and is very quick to load at boot up.

http://www.avira.com

Assuming you have some real awkward infections and the suggestions above failed to totally clean your system I suggest you download a Smitfraud removal program from:

http://www.afterdawn.com/software/deskto...

Again if possible run in Safe Mode.

Be advised that some infections will corrupt or disable your resident security products so for completeness I have listed a couple of online scans that may help you get started:

Panda - http://www.pandasoftware.com/products/Ac...

Trend - http://housecall.trendmicro.com/

Good luck %26amp; safe surfing.

wdw

When i open IE a crytical error window opens and it says?windows xp service internet explorer

dont download it
after you remove the trojan you can avoid any future difficulties by going to mozilla.com downloading firefox, and never ever using internet explorer ever again...for any reason, ever.
I used to get once or twice this kind of windows. They tell that your comp is infected, offer to scun it and after that ask to buy the program. And you can not rid of this window which suggests to register.

Do not pay attention. Run Ad-Adware and Cclean (free additions) and do not worry.