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One change in Firefox 4 is to by default stop Firefox displaying the warning message, but it can be turned back on by changing some preferences.

1. Type about:config into the location bar and press enter
2. Accept the warning message that appears, you will be taken to a list of preferences
3. Locate the preference browser.tabs.warnOnClose, if its value is set to false, double-click on it to change its value to true
4. Repeat this for these 3 preferences browser.warnOnQuit, browser.warnOnRestart and browser.showQuitWarning

VMware vCenter Server 4.1 installation error.

the specified service has been marked for deletion. Unable to delete vctomcat

Installation was interrupted before it can be completed due to error above. I learnt it the hard way. After googling around, I found out that I have services.msc opened and that caused the installation to be interrupted. Next time although it sounds like cliche, close all programs and windows before you can start with installation.

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Solution:-

Do not select Edit Virtual Hardware on the last window

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You can troubleshooting the issue by searching the given error code at HP Web

1783

Click Here to redirect to HP website