resizing image but cant automatically smooth...

my photoshop 7 works great before. i mean, when re-sizing(transform) an image, it automatically blured the edges or the image itself(so the image looks fine), but when i installed the photoshop CS and un-installed it coz its expired already(demo) and installed the photoshop 7 again, the nightmare begins. when i resize an image i saw it pixelated(not good). is there any settings on this?? and when the 1st time i opened the photoshop 7, it tells me to install it on another volume(but i dont have another disk/ partition).

pls help. thnx

Dont worry about installing it on another physical drive, it is just telling you that it would prefer Photoshop to have its own drive, it would make Photoshop faster, but it wont bother you with the message again and wont really have an impact on performance.

As for you problem... Could be a number of things. Make sure that you have anti-aliasing turned on (a checkbox in the context sensitive bar nr top of screen). Or.... try increasing the size of your picture by double and then sizing it back to its original format, this should also anti-alias your document.

If you have a picture that would probably help us diagnose your problem.

Welcome to TPS!
Make sure that your interpolation method is bicubic and not neirest neighbor

thank you all for the reply

Could you tell us what was the problem?

resizing image but cant automatically smoothen the edges when resizing. but now its ok,
i just did what you said. "...your interpolation method is bicubic and not neirest neighbor." thnx