Win7 32bit Spk1 SC3.1+ fail

[AstroDude]

Any ideas whats going on with my install on Win7. ( please dont ask why Win7 32 bit)
here is a part of the log in part: i did all the pre-requisite.
Also tried SC4.0+


[0464:0A70][2026-07-06T19:45:25]i000: Caching bundle from: 'C:\Users\Mitchy\AppData\Local\Temp\{6E73865F-85A6-433C-A0AB-35A5B0A52DDB}\.be\SharpCapInstall.exe' to: 'C:\Users\Mitchy\AppData\Local\Package Cache\{2aebde26-1c44-4a1c-8947-fba96bd87ca7}\SharpCapInstall.exe'
[0464:0A70][2026-07-06T19:45:25]i320: Registering bundle dependency provider: {2aebde26-1c44-4a1c-8947-fba96bd87ca7}, version: 3.1.5027.0
[0464:0A70][2026-07-06T19:45:25]i371: Updating session, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{2aebde26-1c44-4a1c-8947-fba96bd87ca7}, resume: Active, restart initiated: No, disable resume: No
[055C:0D28][2026-07-06T19:45:25]i305: Verified acquired payload: SharpCapInstall.msi at path: C:\ProgramData\Package Cache\.unverified\SharpCapInstall.msi, moving to: C:\ProgramData\Package Cache\{30B8920D-10F3-4EFB-B7CF-618AC5C3A8BD}v3.1.5027\SharpCapInstall.msi.
[0464:0950][2026-07-06T19:45:25]i305: Verified acquired payload: PostInstall.msi at path: C:\Users\Mitchy\AppData\Local\Package Cache\.unverified\PostInstall.msi, moving to: C:\Users\Mitchy\AppData\Local\Package Cache\{4C521E70-0723-4ED1-8675-6EEF4F4AF26D}v3.1.5027\PostInstall.msi.
[0464:0950][2026-07-06T19:45:25]i305: Verified acquired payload: cab5F14527E9461EFEDCF12D0ACCA979C7B at path: C:\Users\Mitchy\AppData\Local\Package Cache\.unverified\cab5F14527E9461EFEDCF12D0ACCA979C7B, moving to: C:\Users\Mitchy\AppData\Local\Package Cache\{4C521E70-0723-4ED1-8675-6EEF4F4AF26D}v3.1.5027\cab1.cab.
[055C:0438][2026-07-06T19:45:25]i301: Applying execute package: SharpCapInstall.msi, action: Install, path: C:\ProgramData\Package Cache\{30B8920D-10F3-4EFB-B7CF-618AC5C3A8BD}v3.1.5027\SharpCapInstall.msi, arguments: ' ARPSYSTEMCOMPONENT="1" MSIFASTINSTALL="7" APPLICATIONROOTDIRECTORY="C:\Program Files\SharpCap 3.1"'
[0464:0A70][2026-07-06T19:45:28]i319: Applied execute package: SharpCapInstall.msi, result: 0x0, restart: None
[0464:0A70][2026-07-06T19:45:28]i323: Registering package dependency provider: {4C521E70-0723-4ED1-8675-6EEF4F4AF26D}, version: 3.1.5027, package: PostInstall.msi
[0464:0A70][2026-07-06T19:45:28]i301: Applying execute package: PostInstall.msi, action: Install, path: C:\Users\Mitchy\AppData\Local\Package Cache\{4C521E70-0723-4ED1-8675-6EEF4F4AF26D}v3.1.5027\PostInstall.msi, arguments: ' ARPSYSTEMCOMPONENT="1" MSIFASTINSTALL="7" LAUNCHDIR="C:\Program Files\SharpCap 3.1" LAUNCHSHARPCAP="0"'
[0464:0A70][2026-07-06T19:46:23]e000: Error 0x80070643: Failed to install MSI package.
[0464:0A70][2026-07-06T19:46:23]e000: Error 0x80070643: Failed to configure per-user MSI package.
[0464:0A70][2026-07-06T19:46:23]i319: Applied execute package: PostInstall.msi, result: 0x80070643, restart: None
[0464:0A70][2026-07-06T19:46:23]e000: Error 0x80070643: Failed to execute MSI package.
[0464:0A70][2026-07-06T19:46:23]i318: Skipped rollback of package: PostInstall.msi, action: Uninstall, already: Absent
[0464:0A70][2026-07-06T19:46:23]i319: Applied rollback package: PostInstall.msi, result: 0x0, restart: None
[0464:0A70][2026-07-06T19:46:23]i329: Removed package dependency provider: {4C521E70-0723-4ED1-8675-6EEF4F4AF26D}, package: PostInstall.msi
[0464:0A70][2026-07-06T19:46:23]i351: Removing cached package: PostInstall.msi, from path: C:\Users\Mitchy\AppData\Local\Package Cache\{4C521E70-0723-4ED1-8675-6EEF4F4AF26D}v3.1.5027\
[055C:0438][2026-07-06T19:46:23]i301: Applying rollback package:

SCcab1.png (58.82 KiB) Viewed 168 times

[admin]

I won't ask why SharpCap 3.1 either (4.0 and 4.1 should in theory work on Windows 7 SP1).

I think the problem is caused by the SharpCap installer trying to install/update the .NET framework, and for some reason the whole process gets upset about the digital signatures on the .NET framework installer components.

I would try installing the .NET Framework 4.81 manually before installing SharpCap (download from https://dotnet.microsoft.com/en-us/down ... ork/net481). If that just works then great, SharpCap should then install. If that has a problem, at least you are then seeing the problem first hand, rather than re-reported via the SharpCap installer.

Another thing I would suggest is to make sure that Windows 7 is fully updated (unfortunately a new install of Win7 these days has so many patches that are needed that it can take hours or even days for the update procedure to work out what to do).

cheers,

Robin