Are you running TurboTax in Windows? If so, do you have Norton 360 (Norton Antivirus) on your Windows computer? Norton 360 may stop TurboTax from running after a recent TurboTax update. If that is your situation, try the following.
1. When the TurboTax window disappears, just click on the icon again and see if TurboTax will run. The problem might be transient.
2. Try temporarily disabling Auto-Protect in Norton 360. (See instructions below.) If that allows TurboTax to run, then while it is running, on the Online menu click Check for Updates to make sure you have the latest TurboTax updates. Also run Live Update in Norton 360 to make sure you have the latest Norton 360 updates. After updating both programs, enable Auto-Protect and see if TurboTax will run.
3, If TurboTax still will not run, except by disabling Auto-Protect, post back here and I will give you instructions for adding an exception to Norton 360 to allow TurboTax to run.
Here are two ways to temporarily disable Auto-Protect.
1. Right-click the Norton 360 icon in the taskbar. On the pop-up menu click Disable Auto-Protect.
2. Open Norton 360. Click Settings, then Antivirus. Click the toggle for Auto-Protect.
Whichever way you do it, it will offer you choices for how long to disable it. Select 10 minutes. Then see if TurboTax will run.