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Internet Explorer freezes, shuts down without warning, or the computer reboots.
This problem is often caused by out-of-date video drivers. Go to the Web site run by the manufacturer of your video card and download, then install, the latest (non-beta) drivers for your video card.
Alternatively, you can try the following:
Click Start, and then click Control Panel.
Click Display (in classic view of Windows XP), click the Settings tab, and then click Advanced.
Click the Performance or Troubleshooting tab (depending on your operating system), and then reduce hardware acceleration a notch at a time until your system stabilizes.
Internet Explorer opens off screen, or tiny, or minimized, or the window will not move
If your taskbar is set to Autohide, turn the setting off and then maximize the problem window. While the window is maximized, increase the height of your taskbar from one row to two. The maximized window will automatically resize itself to fit into the smaller area available with a taller taskbar. Then, return the taskbar to its normal single row and allow the maximized window to resize once more. This will make Windows re-calculate window size and boundaries, overwriting registry keys that may be damaged.
If the affected window is partially off screen, so that the Minimize, Maximize, Restore, and Close buttons are hidden, you can access the same options by clicking on the Internet Explorer icon on the far left edge of the Internet Explorer title bar, or by right-clicking on the Internet Explorer button on the taskbar.
Internet Explorer's window sizing options can be accessed in several ways
If resizing your Taskbar does not work, run Regedit and remove the following registry key values which are most likely corrupt. Do not delete the entire key, just the last word which will appear in the right hand pane.
The computer keeps disconnecting from the Internet
This one can raise suspicions of malware. But, before you reformat your computer, do the following.
In Internet Explorer, on the Tools menu, click Internet Options, and then click the Connections tab.
Under Dial-up or Virtual Private Network settings, click the Settings button.
Under Dial-up settings, click the Advanced button and make sure that Disconnect when connection may no longer be required check box is cleared, and that the Disconnect if idle check box is cleared as well.
In Outlook Express, on the Tools menu, click Options, and then click the Connection tab.
Turn off the option to Hang up after sending and receiving, and then close the Options window
On the Tools menu, click Accounts, and then click the Mail tab.
Make sure that each connection is set to use Any Available. If not, highlight the account then click on Properties.
Click the Connection tab and ensure that the option "Always connect to this account using" is turned off.
"A runtime error has occurred. Do you wish to debug?"
This is another symptom that tends to raise suspicions of malware.
In Internet Explorer, on the Tools menu, click Internet Options, and then click the Advanced tab.
Make sure that Disable Script Debugging (Internet Explorer) and Disable Script Debugging (Other) are both enabled.
Make sure that Disable a Notification about ever script error is disabled.