When you turn on the computer if you get Black screen with blinking cursor on the top left corner, then it could be a problem with the display adapter.
To diaganose, Reboot the computer and start tapping F8 continuously as soon you see the manufacturer name on the screen.
Choose the operating system and boot to the desktop
Right Click My Computer -> Properties
Click Hardware Tab -> Device Manager
Look for Display adapter on the list and disable it
Close all the window and reboot the computer in the regular mode
If you able to get in to desktop on the regular mode, go to Device Manager and enable the display adapter.
Right click on the display adapter and click uninstall.
Reboot the computer (It should automatically reinstall the driver)
Issue will be fixed. If it is not then install the display driver from the manufacturer website
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Most of the people had this issue, taking long time to extract the files in Windows Vista. This issue can be fixed by installing WinRar. But, the problem starts when you uninstall WinRar for some reason.
If we uninstall WinRar, the default functionality of extracting files in Windows Vista will gone for toss.
Recently after observing with few computers it is confirmed that, installing Service Pack 1 fix the problem. In fact installing Service Pack 1 for Windows Vista fix most of the problem including couple of issues with Games software.
MS Outlook - Unable to open links
Error “This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator.”
If you get this error when you click on the link from the Outlook then you have to reset the default browser from the Internet Options (IE).
To do this simply
Open Internet Explorer
Tool -> Internet Options
Programs Tab -> Set IE as an default browser
Click Ok to close the Internet options
Restart the Outlook and check. Issue will be fixed