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- StanG on MS365, Outlook and Exchange Online issues: Appointments, Mails etc.
- Mike on Windows 11 24H2: Sudden network failures/issues after upgrade?
- Aldo on Adaptec download site is dead – it's now Microchip
- StanG on Windows 11: Still RDP issues (Feb. 2025)?
- Harvey Nusbaum on Windows 11 24H2: Fix for Synaptics audio issue on HP Prodesk 600 G4
Recent Comments
- StanG on MS365, Outlook and Exchange Online issues: Appointments, Mails etc.
- Mike on Windows 11 24H2: Sudden network failures/issues after upgrade?
- Aldo on Adaptec download site is dead – it's now Microchip
- StanG on Windows 11: Still RDP issues (Feb. 2025)?
- Harvey Nusbaum on Windows 11 24H2: Fix for Synaptics audio issue on HP Prodesk 600 G4
Tag Archives: error 0xC1900101 – 0x20004
Windows 10: Upgrade error 0xC1900101 – 0x20004
Some users are receiving error 0xC1900101 – 0x20004 during upgrade from Windows 7/8.1 to Windows 10 (GA). Here are a few tips and workarounds to overcome this error.