Unresponsive cursor in WEB I only

Hello,

when I am working in WEB I, the interface starts to freeze and every time I click on anything that should pop up a window ( such as creating a new variable etc.), nothing happens until I move the cursor away from the screen and click on a random space outside of Web I screen, which then triggers the window to pop up.

I know this might not be a BO issue per say, even though I do not have this problem with any other software or Java app online, but any help or ideas as to why this is happening is appreciated.

The issue can only be resolved if I log out of Web I and close Explorer.

We are on BO 4.0 SP11. Browser IE 9 and IE 10.

Thanks, Maria