what's windows messenger?
alright, alright, well you haven't even said what software you are using to try and get into yr hotmail.
If you use anything other than a browser that
claims to be internet exploder or aol drekscape, then you will have problems. solution, get netscape (bleaurgh!) or Opera (which pretends to be internet exploder by default) and use that to access the internet. oh yes, use internet explorer instead if you want, but don't come running to me...
That temp file is not the problem. Hotmail/iexplore saves a copy of the page there and opens it up from yr hard drive, rather than the actual site i think... do you have enough memory to fit some stuff in there?
i might suggest deleting your C:/WINDOWS/TEMP folder altogether. it will be recreated immediately you run a program but you will free up a lot of disk space.
also, you don't say how long this has been going on, it is possible that the server with yr email on it is being serviced today (although you usually get a facetious "fuck off, come back later" type message from MSN when this happens).
also, make sure you have cookies fully enabled by going into file->preferences, edit->preferences or tools->internet options (it's dependant on the OS, browser and version where the internet control panel actually is) and checking it out under the cookies section.
Sure, accepting cookies makes you totally vulnerable to computer hacking and bank fraud, but Microsoft won't let you into their site unless you turn cookies on i'm afraid!
okay, good luck, any more problems, come back, and maybe be a bit more specific next time!