Solution: Error 1935 When Installing AutoCAD

Error 1935 during AutoCAD installation can be resolved using the following methods:

Method 1: Modify Registry Value

1. Open Registry Editor by typing regedit in Windows search and pressing Enter.
2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control.
3. In the right pane, locate RegistrySizeLimit. If it doesn’t exist, right-click Control, select New, then DWORD (32-bit) Value, and name it RegistrySizeLimit.
4. Double-click RegistrySizeLimit, set Base to Hexadecimal, and Value data to ffffffff.
5. Alternatively, import a provided .reg file.

Method 2: Configure Windows Modules Installer Service

1. Open Task Manager (Ctrl+Shift+Esc).
2. Go to the “Services” tab.
3. Find “Windows Modules Installer” service.
4. Right-click, select “Properties”, and change “Startup type” to “Manual”.
5. Right-click the service again and select “Start”.

Method 3: Perform an In-Place Upgrade of Windows

This method addresses AutoCAD installation failures without specific error messages, C++ installation failures (Error 1603), manual C++ redistributable installation showing Error 1935, or “catastrophic failure” messages when enabling .NET 3.5. It repairs system components using the Media Creation Tool without losing personal files or applications.

For Windows 10

1. Download the Media Creation Tool for Windows 10 from https://www.microsoft.com/en-us/software-download/windows10.
2. Run the downloaded MediaCreationTool20H2.exe (or equivalent).
3. Follow prompts to download the Windows 10 ISO image file.
4. Once downloaded, click Finish.
5. Right-click the ISO file and select Mount.
6. Open the mounted ISO drive and run setup.exe.
7. Follow the setup prompts.
8. CRITICAL: Select Keep personal files and apps to avoid data loss.
9. Click Install.
10. Wait for the installation and multiple restarts to complete.
11. Personal files, installed applications, and computer data will remain unaffected.

Image Placeholder: Windows 10 Setup Screen

For Windows 11

1. Download the system image file for Windows 11 from https://www.microsoft.com/en-us/software-download/windows11.
2. Run the Windows 11 installation tool (mediacreationtool.exe).
3. Click Accept.
4. Uncheck options as needed and click Next.
5. Select ISO file and click Next.
6. Choose a location and click Save for the ISO download.
7. Wait for the ISO download to complete.
8. Prepare for Installation/Upgrade:
   • Locate the downloaded window.iso file. Right-click and select Mount.
   • (If Mount is unavailable on older systems, use virtual drive software).
   • The Window.iso will load to a virtual DVD drive. Open it and run setup.exe.
9. Click Change how Setup downloads updates.
10. Select Not right now and click Next.
11. After the installation check, click Accept.
12. Choose one of the following options:
    • Keep personal files, settings, and apps (Full upgrade)
    • Keep personal files only (Keeps files, not settings/apps)
    • Nothing (Clean installation)
13. Click Next to begin the installation/upgrade process.
14. The process involves several reboots, which is normal.