actually this happens couple of times ....but today i figure out the source of problems......... i was extracting la large winrar file...but i accidently open it more the twice in few sec.......(system was running on various programs like windvd6)..then that winrar window stucked...."not responding"....so after few secs i closed the window.....but it result in reloading explore.exe like pc was started .....and i got my all program back running....but then i reliezed that font size of internet explore has changed.........if i restart pc it will reset to orignal setting,.......but i wana y that happened and wts alternative to reset font size rather then restarting ur pc .....

ah... you can change the IE font size very easily if your mouse has a scroll - just press Ctrl key on the keyboard and roll the scroll - one direction (that would scroll up) decreases the size, the other increases it.
if you do not have a scroll on the mouse, you can change the font size from the menu View -> Text size - and then select the size you want.
Restarting the PC sounds like overkill...

Small addition; that only works if the website uses relative font sizes like <font size="1">. If the website uses fixed sizes in pixels you cannot easily resize the text. Try resizing the text on cdfreaks.com via the CRTL+scroll combo. Here it doesn't work..

Ah... am so used to FireFox (cdfreaks.com resizes fine with Ctrl + scroll there) that I forgot Thanks for the addition.

oiccc i didnt know abt firefox....but in case of iexplore its working fine...