This site will look much better in a browser that supports web standards, but it is accessible to any browser or Internet device.
Passwords are saved in one of two places - in <username>.pwl 
					or in a cookie stored on the system. For a web page based 
					password request, you need to find the cookie for the site 
					in question and delete it. 
					
					For password prompt from IE, go to tools, internet options, 
					content, autocomplete and turn on the option to remember 
					passwords. 
					
					Deleting the DWORD AskUser in the right hand pane of REGEDIT 
					may help if all else fails.
					
					AutoComplete, User Names and Passwords on Forms
					HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\IntelliForms\SPW
Since your computer freezes when you try to delete 
					passwords via tools, internet options, content, autocomplete 
					I suspect the relevant reg.key is damaged. 
					
					Using regedit, back up your registry. Export the following 
					reg key and then delete it (just the key, not the whole 
					folder). 
					
					HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\IntelliForms\SPW