Here’s a structured troubleshooting post for the WinOLS 2.24 “error load dll” issue. You can copy and paste this into a forum or support ticket.
Title: WinOLS 2.24 – “Error load DLL” on startup / opening project Issue: When launching WinOLS 2.24 or trying to open a file, I get an error message: “Error load DLL” (sometimes with a missing filename like msvcp140.dll , vcruntime140.dll , or olsapi.dll ). Environment:
Windows 10/11 (32/64-bit) WinOLS 2.24 (standard or custom install)
✅ Fixed by doing one or more of the following: 1. Run as Administrator Right-click WinOLS.exe → Run as administrator . 2. Install missing Visual C++ Redistributables WinOLS 2.24 needs older VC++ runtimes. Download and install both x86 and x64 versions (even on 64-bit Windows): winols 2.24 error load dll
VC++ 2005-2022 all-in-one (x86) VC++ 2015-2022 x64
Then restart your PC. 3. Re-register DLLs (for missing custom WinOLS DLLs) Open Command Prompt as Admin and run: cd C:\Program Files (x86)\WinOLS regsvr32 olsapi.dll regsvr32 WinOLS_DLL.dll
(Adjust path if installed elsewhere.) 4. Check antivirus / Windows Defender Real-time protection may have quarantined WinOLS DLLs. Here’s a structured troubleshooting post for the WinOLS 2
Restore from Virus & threat protection → Protection history Add the WinOLS folder to exclusions.
5. Compatibility mode Right-click WinOLS.exe → Properties → Compatibility
Set Windows 7 mode Disable fullscreen optimizations Environment: Windows 10/11 (32/64-bit) WinOLS 2
6. Reinstall with disabled UAC / antivirus off
Uninstall WinOLS Disable antivirus and User Account Control (temporarily) Reinstall using right-click → Run as administrator