Hi Zombie,
Its probably a problem with Shell Extensions. A Shell Extension is nothing but right click menu options installed by third party programs on your computer. They appear to access features of a particular program within Windows Explorer window. A malfunctioning shell extension could be responsible for your computer to crash like this.
What you can do is disable any malfunctioning shell extensions using appropriate programs. Google for free shell extension editor programs, you'll get plenty of freewares. Install it. From a complete list of all shell extensions, right click the faulty one and select "Disable" option.
If you are experiencing Windows 7 crashes after installing a specific program then it is possible that it might have installed some Dynamic Link Library (DLL) files which no longer support the operating system which is currently installed. For example, the program might have installed a DLL file which is made for Windows XP on your Windows 7 computer likewise. To resolve this issue, there are two choices: 1) Uninstall the program; or otherwise 2) Restore your computer to an earlier date.
To uninstall the most recently installed program, click Start, select Control Panel. Click Programs | Uninstall a Program. Select the program name and click "Uninstall" button.
To restore your computer back to an earlier date use System Restore feature. Click Start, point to All Programs | Accessories | System Tools. Select System Restore. Click Next, select a restore point before installing your new software and click "Restore my computer". Follow the on screen instructions.
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