[Safrguns]

Try deleting all contents of the cache folder
Should be able to find this in options or tools.

[the invisib1e hand]

you must be logged in.

[PhilosopherStone1000]

Virus.

Run a virus scan or have your IT guys do it.

[Bloody Sam Roberts]

The obvious solution is to get away from IE anything and download/install Firefox. You'll be glad you did.

Otherwise, go into internet settings in IE and clear the browser cache and retry.

[youngidiot]

Go to the same sites and push “F5” and tell us what happens.

[Kirkwood]

If this is part of your job, the why don’t you just ask your IT people?

[tx_eggman]

Go to:

Tools Menu, Internet Options, Browsing History, Settings

Under "Check for newer versions of stored pages" – Select Every time I visit the webpage

If that doesn't fix it for you then I apologize for the pic.