Fixing IE Issue: Saving Images only as BMP
There are a number of causes to this problem, but the most common is that the Temporary Internet Files folder is full.
To increase the size of the folder, go to Start -> Control Panel -> Internet Options and click "Settings."
Use the slider provided to increase or decrease the folder size, and press OK.
If you wish to totally clear out the Temporary Internet Files folder, click "Delete Files" and then check "Delete all offline content." It may take a while, so relax. Then, press OK.
If your issue persists, you may have a corrupt object installed, so go to Internet Options again and choose "Settings" and then "View objects." Delete any whose status is anything other than "Installed."
Then, close the folder and Internet Options.