how do i fix microsoft error 1603

marciew1 · ‎March 30, 2025

RachelW33 · ‎March 30, 2025

Doing a manual update for TurboTax Desktop should resolve Microsoft Installer Error:1603.

Please follow the directions in this TurboTax Help Article: Manually Update TurboTax for Windows Software

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Inugasuki · ‎March 31, 2025

I am using TT desktop and getting the same error 1603. Manual update didn't work.

Thank you.

CatinaT1 · ‎April 1, 2025

You need to clear your Cache and Cookies before doing the manual update.

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Inugasuki · ‎April 5, 2025

Thanks for your reply.

Actually, the error message I am getting is: Microsoft Installer error 2725.

Thanks again for your help!

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