If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

Let's take a good look at the clues in this example that pretends to be a subscription confirmation to Norton LifeLock. 1. The sender address. The sender's email address is often the first clue that the message is a fake. In this example they haven't even tried to make it look real.

If you receive a phone call claiming to be from Microsoft, or see a pop-up window on your PC with a fake warning message and a phone number to call and get your “issue” fixed, it’s better to be safe and not click any links or provide any personal information.

Go to Settings and more > Settings . In the left navigation, select Site permissions. In Site permissions, select Adobe Flash. Set the toggle on for the Ask before running Flash option. The Block and Allow lists will be available after you visit a site that uses Flash.

Run-time error '339': Component 'MSDATGRD.OCX' or one of its dependencies not correctly registered: a file is missing or invalid. Cause. This error occurs when the MSDATGRD.OCX file does not exist in the Windows system directory. Resolution. Search for MSDATGRD.OCX in the C:\Winnt\system32 or C:\Windows\system32 folder.

Symptoms. When you start Excel or use the Microsoft Forecaster Excel Add-in, you receive this error message: Microsoft Forms - Could not load an object because it is not available on this machine.

You can easily insert a check mark (also known as a "tick mark") in Word, Outlook, Excel, or PowerPoint. These marks are static symbols. If you're looking for an interactive check box that you can click to check or uncheck, see: Add a check box or option button (Excel) or Make a checklist in Word.

Blue Screen errors (also sometimes called black screen errors or STOP code errors) can occur if a serious problem causes Windows to shut down or restart unexpectedly. You might see a message that says, "Windows has been shut down to prevent damage to your computer" or a similar message.

Add-ons can sometimes cause browsers to run slowly and crash, or they might pose a security or compatibility risk. You can turn off specific add-ons to help increase your browsing speed, or if you suspect they're causing problems for Internet Explorer.

Run-time error '339': Component 'MSDATGRD.OCX' or one of its dependencies not correctly registered: a file is missing or invalid. Cause. This error occurs when the MSDATGRD.OCX file does not exist in the Windows system directory. Resolution. Search for MSDATGRD.OCX in the C:\Winnt\system32 or C:\Windows\system32 folder.