Open IE8 and
Choose tools link from menu bar and then
On the general tab make sure that you do not have a check mark in the box that says "Delete browsing history on exit"
Click the settings button and select
the radio button that says "Automatically" then
enter a number into the Disk space to use box usually 50 is fine
And enter a number into the Days to keep pages in histroy box, usually 20 is fine
For remembering usernames and passwords select the Content tab at the top then
in the Area labeled AutoComplete click the settings button check the following
Use Windows Search for better results
User names and passwords on forms
Ask me before saving passwords.
OK your way back out of there and restart IE8
Keep us posted.