IE8 wont open

[jekkherg]

my computer (acer aspire L310, windows vista 32 bit OS) has been having problems of not completing bootup. sometimes it stops on the loading window during boot up. sometimes it opens the way it should. well, it still opens. so there. until yesterday, IE8 wont open. opens a window, then closes immediately. i tried running it as an administrator but it gives me a pop up window that says

Debug error!
program:C:\program files\Internet Explorer\iexplore.exe

this application has requested the runtime to terminate it in an unusual way. Please contact the application's support team for more information.

(Please try to debug the application)

<Abort> <Retry> <Terminate>


What am I supposed to do?

and by the way, firefox is working.

thanks.

[Broni]

Start with...

Go Start>Run ("Start Search" in Vista/7), type in:
sfc /scannow
Click OK (hold CTRL, and SHIFT, hit Enter in Vista/7).
Have Windows CD/DVD handy (with Vista/7, most likely, you won't need it).
If System File Checker (sfc) will find any errors, it may ask you for the CD/DVD (rarely in Vista/7 case).

[@@]

Is it possible to use software
MicrosoftFixit50043   
http://download.microsoft.com/download/9/C/4/9C4D861F-C91E-447A-A4C5-56932C3D1C71/MicrosoftFixit50043.msi