Although User Account Control is annoying, it is an important security feature. With UAC on, you will be notified if malware is trying to make changes to your system. If you'd still like to turn it off, do a Windows Search for User Account Control to open the settings menu. Thereare four levels of notification, from "never" to "always". Move the slider down to "never" to turn UAC off entirely.

        For a one-time override, you can simply right-click a program and then click "Run as administrator". If you'd like to solve the issue for good you need to right-click the program, open the Properties menu and then go to the Compatibility tab. At the bottom you'll find a checkbox labeled "Run this program as an administrator." Check it and then exit the menu by clicking okay.

        Right-click on an empty portion of your desktop and then select Screen Resolution. Your display will be listed here along with the current resolution. Click on the resolution drop-down box and change to the highest resolution available, then exit by pressing OK

        Your first step should be to update your drivers. AMD, NVIDIA and Intel all have websites for their respective graphics solutions, and they release updates with performance enhancements and new features frequently. If this error still occurs after you update your drivers, the problem is probably the result of incompatible hardware. Older video cards sometimes do not support the features provided by modern games. Look up your video card's specifications on the manufacturer's website and compare those to the game's minimum system requirements

        Open Power Options by visiting the Control Panel or doing a Windows Search. Have a look at the power plan that is currently selected. If it is "High Performance" or a custom plan this is likely why your computer does not sleep or hibernate. You can either select a different power plan, change the settings of the one you currently have selected, or create a custom plan by choosing the Create a Power Plan option.

        According to Microsoft, this means the activation key you are using is for an upgrade version of Windows 7, but a previous version of Windows was not installed. Remember, a Windows upgrade is exactly that, and will not work if you don't have a previous Windows installation on your PC. If this error is appearing even though you do have a previous version of Windows installed, you'll need to contact Microsoft customer service to clear up the issue

        In the System window, find the information field labeled System Type. It will likely say "32-bit Operating System." To address four gigabytes of RAM or more, you must have Windows 64-bit installed. You will need to re-install Windows with a 64-bit installation disk to resolve the problem.

        Run regedit and find HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\Find and delete the UpperFilters and LowerFilters entries, then reboot. If this doesn't work, enterDisk Management and look for the drive letter of your DVD drive. Right-click that drive, then click Change Drive Letter and Paths. Change the drive letter to some other, unused letter, then reboot.