One reason why the desktop version of TaxSlayer Pro may not run correctly is that not all the features of Microsoft .NET Framework are installed. When our our tech support staff connect to a customer's computer to diagnose a problem, one of the first things they do is ensure that all features of all versions of .NET Framework are installed.
Do the following steps to fully install .NET Framework on a PC.
1. Open the Windows Control Panel.
2. Navigate to Programs > Turn Windows features on or off.
3. In the Windows Features window, note the first two entries are for .NET Framework:
4. Click the plus sign next to each .NET Framework entry to expand it, then check every item in every menu and submenu that isn't checked:
5. Click OK and Windows will start installing the missing features. This will take a few minutes, and the length of time it takes depends on the speed of the PC and how many features need installation. When it's finished you may or may not be prompted to reboot.