During QuickBooks installation or updates, QuickBooks Error Code 1402 appears, signifying problems with registry settings or system components. Usually, it results from incomplete installations, incorrect permissions, or corrupted Windows components. Repairing Windows components, allowing administrator rights, and reinstalling QuickBooks using the clean install tool are the steps involved in fixing it. If you have any problems, give the QB Support team a call at 1.855.738.2784.