A couple weeks ago a Lenovo T61 running W7 Pro 32-bit started crashing every time IE11 was opened. The IE11 page showed:
Internet Explorer has closed this webpage to help protect your computer
A malfunctioning or malicious add-on has caused Internet Explorer to close this webpage.
What you can do:
Go to your home page
Try to return to yahoo.com
Windows Data Execution Prevention detected an add-on trying to use system memory incorrectly. This can be caused by a malfunction or a malicious add-on.
Other things you can do:
Go online to learn about the Data Execution Prevention (DEP) security feature
The Windows error box showed:
Problem Event Name: BEX
Application Name: iexplore.exe
Application Version: 11.0.9600.18057
Application Timestamp: 55f8d3e4
Fault Module Name: StackHash_0a9e
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 00000000
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
Event Viewer (Event ID 1000) showed:
Faulting application name: iexplore.exe, version: 11.0.9600.18057, time stamp: 0x55f8d3e4
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x00000000
Faulting process id: 0x1778
Faulting application start time: 0x01d1126776b845bd
Faulting application path: C:\Program Files\Internet Explorer\iexplore.exe
Faulting module path: unknown
Report Id: b7663a48-7e5a-11e5-9614-00262df73e61
Running IE without add-ons made no difference. I could get to the Internet using Safe Mode with Networking. To make a long story short - not malware. Twice I used disaster recovery software to return to the 09/30/2015 state and could again access the Internet. Once a McAfee update was run, though, I was in trouble again. Once I unstalled McAfee from the computer, no problems.
Today I installed Total Protection 2016 on a Lenovo W510 running W7 Pro 32-bit. After installation, I got the same behavior. No access to the Internet other than Safe Mode with Networking. McAfee Tech Support worked with me to restore connectivity. It appeared that one the main step the agent took was to reset the IE11 security settings for all four zones to default. (A couple had not been at the default level before shat.) Only after our session ended did I go into Firewall - Intrusion Detection. The default setting is to have the line "Basic ... (recommended) selected but the box above it "Use Intrusion Protection" unchecked. If I checked that box, IE11 would crash every time again. I have no idea whether the default setting actually has Basic Intrusion Protection active or not. In any case, checking that box brings disaster. I have tested this conclusion on the T510 and get the same behavior.
What's the deal?