|A 10gb drive is really too small and you should be looking to get a larger disc. My own C\Windows folder is 7.9gb. Admittedly I have a lot of progs installed in C drive so my C\Progs folder is 15.4gb.|
Your outlook email archive file will probably be one of those hidden system files. I don't use outlook so not sure where it would be.
doubleclick My Computer then go to Tools>Folder Options>View
look down the dropdown menu and under Hidden Files click the radio button for Show Hidden Files then scroll down a bit further and take the tick out of "Hide Protected operating system files"
Then restart the system. You should now be able to locate the OST file. Just be aware that if you delete it you will lose all your archived email including any email sub-folders you may have set up.
After you have done the job return your folder options to the original settings to re-hide the protected files etc.
Do the above at your own risk.
My personal recommendation would be to go into your email account and delete any unwanted content manually. The most bloated file is usually Sent Items since it contains copies of not only your sent mail but also any file attachments you ever sent. Those can take up a lot of room.
You can bypass the recyclebin by pressing Ctrl.Delete.
Goin' Fishin' (Some day)