You bet. Microsoft Paint can do it, Start > All Programs > Accessories > Paint. Now drag and drop your image into it then select Image > Attributes. Now you can resize it by changing the pixel values
Micosoft has a cool little toy called Image resizer, Works great. Pick it up here. http://download.microsoft.com/download/whistler/Install/2/WXP/EN-US/ImageResizerPowertoySetup.exe