The New Tab Problem
It has been observed that IE7 works fine until you try to open a new tab. Once you open a new tab, there are several possibilities that may cause IE to shut down.
First up, you may notice that whenever you try to open a new tab, the memory consumption increases drastically, and once you open several tabs, the count keeps going up. Finally, it consumes 100% CPU resources, freezes and finally shuts down.
Note: IE excessive memory usage problem has been covered in a separate article, and you may view it here.
Alternatively, upon opening a new tab, you may observe that IE tries to connect to the Internet, but fails to do so. Even if you try to close the window, it shows the “not responding" status, and then you’ve no other option, except to kill the process via task manager, resulting in IE shutting down.
On most occasions, tab issues can be fixed via the Advanced Settings tab of IE7.
1. Go to Internet Options by clicking on Start--> Run--> type: INETCPL.CPL and then go to the Advanced tab.
2. Disable the option that reads - "Enable third-party browser extensions".
3. Now, close the window and restart IE.
Note: Explorer excessive memory problem is a totally different issue altogether and you may find its relevant fix here