Installer failes to install on a system where Orthanc is already installed. Please see log below:
[1004:11F8][2017-12-23T13:34:40]i001: Burn v3.11.0.1701, Windows v6.1 (Build 7601: Service Pack 1), path: C:\Users\ethosmed\AppData\Local\Temp\{7CB47B22-53FB-4496-8D0D-FD498F4D92AB}\.cr\OHIFViewerInstaller-Complete-1.0.0.exe
[1004:11F8][2017-12-23T13:34:40]i009: Command Line: '-burn.clean.room=C:\Users\ethosmed\Desktop\OHIFViewerInstaller-Complete-1.0.0.exe -burn.filehandle.attached=184 -burn.filehandle.self=192'
[1004:11F8][2017-12-23T13:34:40]i000: Setting string variable 'WixBundleOriginalSource' to value 'C:\Users\ethosmed\Desktop\OHIFViewerInstaller-Complete-1.0.0.exe'
[1004:11F8][2017-12-23T13:34:40]i000: Setting string variable 'WixBundleOriginalSourceFolder' to value 'C:\Users\ethosmed\Desktop\'
[1004:11F8][2017-12-23T13:34:40]i000: Setting string variable 'WixBundleLog' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440.log'
[1004:11F8][2017-12-23T13:34:40]i000: Setting string variable 'WixBundleName' to value 'OHIF Viewer'
[1004:11F8][2017-12-23T13:34:40]i000: Setting string variable 'WixBundleManufacturer' to value 'OHIF'
[1004:13C8][2017-12-23T13:34:40]i000: Setting numeric variable 'WixStdBALanguageId' to value 1033
[1004:13C8][2017-12-23T13:34:40]i000: Setting version variable 'WixBundleFileVersion' to value '1.0.0.0'
[1004:11F8][2017-12-23T13:34:40]i100: Detect begin, 4 packages
[1004:11F8][2017-12-23T13:34:40]i000: Registry key not found. Key = 'SOFTWARE\MongoDB\Server'
[1004:11F8][2017-12-23T13:34:40]i000: Setting numeric variable 'IsMongoDBInstalled' to value 0
[1004:11F8][2017-12-23T13:34:40]i000: Registry key not found. Key = 'SOFTWARE\Node.js'
[1004:11F8][2017-12-23T13:34:40]i000: Setting numeric variable 'IsNodeJsInstalled' to value 0
[1004:11F8][2017-12-23T13:34:40]i000: Registry key not found. Key = 'SYSTEM\CurrentControlSet\services\Orthanc'
[1004:11F8][2017-12-23T13:34:40]i000: Setting numeric variable 'IsOrthancInstalled' to value 0
[1004:11F8][2017-12-23T13:34:40]i101: Detected package: node_v6.11.3_x64.msi, state: Absent, cached: None
[1004:11F8][2017-12-23T13:34:40]i101: Detected package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi, state: Absent, cached: None
[1004:11F8][2017-12-23T13:34:40]i101: Detected package: OrthancInstaller_Win64_17.7.0.exe, state: Absent, cached: None
[1004:11F8][2017-12-23T13:34:40]i101: Detected package: OHIFViewerInstaller_Single_1.0.0.msi, state: Absent, cached: Complete
[1004:11F8][2017-12-23T13:34:40]i199: Detect complete, result: 0x0
[1004:13C8][2017-12-23T13:34:41]i000: Setting numeric variable 'EulaAcceptCheckbox' to value 0
[1004:11F8][2017-12-23T13:34:41]i200: Plan begin, 4 packages, action: Install
[1004:11F8][2017-12-23T13:34:41]i052: Condition 'IsNodeJsInstalled = 0 AND VersionNT64' evaluates to true.
[1004:11F8][2017-12-23T13:34:41]i000: Setting string variable 'WixBundleRollbackLog_node_v6.11.3_x64.msi' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440_000_node_v6.11.3_x64.msi_rollback.log'
[1004:11F8][2017-12-23T13:34:41]i000: Setting string variable 'WixBundleLog_node_v6.11.3_x64.msi' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440_000_node_v6.11.3_x64.msi.log'
[1004:11F8][2017-12-23T13:34:41]i052: Condition 'IsMongoDBInstalled = 0 AND VersionNT64' evaluates to true.
[1004:11F8][2017-12-23T13:34:41]i000: Setting string variable 'WixBundleRollbackLog_mongodb_win32_x86_64_2008plus_3.4.1_signed.msi' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440_001_mongodb_win32_x86_64_2008plus_3.4.1_signed.msi_rollback.log'
[1004:11F8][2017-12-23T13:34:41]i000: Setting string variable 'WixBundleLog_mongodb_win32_x86_64_2008plus_3.4.1_signed.msi' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440_001_mongodb_win32_x86_64_2008plus_3.4.1_signed.msi.log'
[1004:11F8][2017-12-23T13:34:41]i052: Condition 'IsOrthancInstalled = 0 AND VersionNT64' evaluates to true.
[1004:11F8][2017-12-23T13:34:41]w321: Skipping dependency registration on package with no dependency providers: OrthancInstaller_Win64_17.7.0.exe
[1004:11F8][2017-12-23T13:34:41]i000: Setting string variable 'WixBundleLog_OrthancInstaller_Win64_17.7.0.exe' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440_002_OrthancInstaller_Win64_17.7.0.exe.log'
[1004:11F8][2017-12-23T13:34:41]i000: Setting string variable 'WixBundleRollbackLog_OrthancInstaller_Win64_17.7.0.exe' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440_002_OrthancInstaller_Win64_17.7.0.exe_rollback.log'
[1004:11F8][2017-12-23T13:34:41]i052: Condition 'VersionNT64' evaluates to true.
[1004:11F8][2017-12-23T13:34:41]i000: Setting string variable 'WixBundleRollbackLog_OHIFViewerInstaller_Single_1.0.0.msi' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440_003_OHIFViewerInstaller_Single_1.0.0.msi_rollback.log'
[1004:11F8][2017-12-23T13:34:41]i000: Setting string variable 'WixBundleLog_OHIFViewerInstaller_Single_1.0.0.msi' to value 'C:\Users\ethosmed\AppData\Local\Temp\OHIF_Viewer_20171223133440_003_OHIFViewerInstaller_Single_1.0.0.msi.log'
[1004:11F8][2017-12-23T13:34:41]i201: Planned package: node_v6.11.3_x64.msi, state: Absent, default requested: Present, ba requested: Present, execute: Install, rollback: Uninstall, cache: Yes, uncache: No, dependency: Register
[1004:11F8][2017-12-23T13:34:41]i201: Planned package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi, state: Absent, default requested: Present, ba requested: Present, execute: Install, rollback: Uninstall, cache: Yes, uncache: No, dependency: Register
[1004:11F8][2017-12-23T13:34:41]i201: Planned package: OrthancInstaller_Win64_17.7.0.exe, state: Absent, default requested: Present, ba requested: Present, execute: Install, rollback: Uninstall, cache: Yes, uncache: No, dependency: None
[1004:11F8][2017-12-23T13:34:41]i201: Planned package: OHIFViewerInstaller_Single_1.0.0.msi, state: Absent, default requested: Present, ba requested: Present, execute: Install, rollback: Uninstall, cache: No, uncache: No, dependency: Register
[1004:11F8][2017-12-23T13:34:41]i299: Plan complete, result: 0x0
[1004:11F8][2017-12-23T13:34:41]i300: Apply begin
[1004:11F8][2017-12-23T13:34:41]i010: Launching elevated engine process.
[1004:11F8][2017-12-23T13:34:41]i011: Launched elevated engine process.
[1004:11F8][2017-12-23T13:34:41]i012: Connected to elevated engine.
[1098:0F54][2017-12-23T13:34:41]i358: Pausing automatic updates.
[1098:0F54][2017-12-23T13:34:41]i359: Paused automatic updates.
[1098:0F54][2017-12-23T13:34:41]i360: Creating a system restore point.
[1098:0F54][2017-12-23T13:34:41]w363: Could not create system restore point, error: 0x80070422. Continuing...
[1098:0F54][2017-12-23T13:34:41]i370: Session begin, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{1194278d-99d9-4dfd-badf-32f2c58a3aeb}, options: 0x7, disable resume: No
[1098:0F54][2017-12-23T13:34:41]i000: Caching bundle from: 'C:\Users\ethosmed\AppData\Local\Temp\{E697E2E2-E7FA-4A9B-BC96-5B5CBD9AEFDB}\.be\OHIFViewerInstaller-Complete-1.0.0.exe' to: 'C:\ProgramData\Package Cache\{1194278d-99d9-4dfd-badf-32f2c58a3aeb}\OHIFViewerInstaller-Complete-1.0.0.exe'
[1098:0F54][2017-12-23T13:34:41]i320: Registering bundle dependency provider: {1194278d-99d9-4dfd-badf-32f2c58a3aeb}, version: 1.0.0.0
[1098:0F54][2017-12-23T13:34:41]i371: Updating session, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{1194278d-99d9-4dfd-badf-32f2c58a3aeb}, resume: Active, restart initiated: No, disable resume: No
[1098:0AC4][2017-12-23T13:34:43]i305: Verified acquired payload: node_v6.11.3_x64.msi at path: C:\ProgramData\Package Cache\.unverified\node_v6.11.3_x64.msi, moving to: C:\ProgramData\Package Cache\{4E3C9C11-100B-49F1-927F-0E5CC75FB109}v6.11.3\node-v6.11.3-x64.msi.
[1098:0AC4][2017-12-23T13:34:44]i305: Verified acquired payload: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi at path: C:\ProgramData\Package Cache\.unverified\mongodb_win32_x86_64_2008plus_3.4.1_signed.msi, moving to: C:\ProgramData\Package Cache\{4FD99DCB-7D98-480C-B535-692049F99F38}v3.4.1\mongodb-win32-x86_64-2008plus-3.4.1-signed.msi.
[1098:0AC4][2017-12-23T13:34:45]i305: Verified acquired payload: OrthancInstaller_Win64_17.7.0.exe at path: C:\ProgramData\Package Cache\.unverified\OrthancInstaller_Win64_17.7.0.exe, moving to: C:\ProgramData\Package Cache\4CB2DF5E5A135BDBDFDF26DD2F145C573A238DF0\OrthancInstaller-Win64-17.7.0.exe.
[1098:0AC4][2017-12-23T13:34:46]i304: Verified existing payload: OHIFViewerInstaller_Single_1.0.0.msi at path: C:\ProgramData\Package Cache\{9A54BED8-CE8C-4431-84B6-0FBE1AA24B8D}v1.0.0\OHIFViewerInstaller-Single-1.0.0.msi.
[1098:0F54][2017-12-23T13:34:46]i323: Registering package dependency provider: {4E3C9C11-100B-49F1-927F-0E5CC75FB109}, version: 6.11.3, package: node_v6.11.3_x64.msi
[1098:0F54][2017-12-23T13:34:46]i301: Applying execute package: node_v6.11.3_x64.msi, action: Install, path: C:\ProgramData\Package Cache\{4E3C9C11-100B-49F1-927F-0E5CC75FB109}v6.11.3\node-v6.11.3-x64.msi, arguments: ' ALLUSERS="1" ARPSYSTEMCOMPONENT="1" MSIFASTINSTALL="7"'
[1004:11F8][2017-12-23T13:35:11]i319: Applied execute package: node_v6.11.3_x64.msi, result: 0x0, restart: None
[1098:0F54][2017-12-23T13:35:11]i325: Registering dependency: {1194278d-99d9-4dfd-badf-32f2c58a3aeb} on package provider: {4E3C9C11-100B-49F1-927F-0E5CC75FB109}, package: node_v6.11.3_x64.msi
[1098:0F54][2017-12-23T13:35:11]i323: Registering package dependency provider: {4FD99DCB-7D98-480C-B535-692049F99F38}, version: 3.4.1, package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi
[1098:0F54][2017-12-23T13:35:11]i301: Applying execute package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi, action: Install, path: C:\ProgramData\Package Cache\{4FD99DCB-7D98-480C-B535-692049F99F38}v3.4.1\mongodb-win32-x86_64-2008plus-3.4.1-signed.msi, arguments: ' ALLUSERS="1" ARPSYSTEMCOMPONENT="1" MSIFASTINSTALL="7"'
[1004:11F8][2017-12-23T13:35:30]i319: Applied execute package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi, result: 0x0, restart: None
[1098:0F54][2017-12-23T13:35:30]i325: Registering dependency: {1194278d-99d9-4dfd-badf-32f2c58a3aeb} on package provider: {4FD99DCB-7D98-480C-B535-692049F99F38}, package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi
[1098:0F54][2017-12-23T13:35:30]i301: Applying execute package: OrthancInstaller_Win64_17.7.0.exe, action: Install, path: C:\ProgramData\Package Cache\4CB2DF5E5A135BDBDFDF26DD2F145C573A238DF0\OrthancInstaller-Win64-17.7.0.exe, arguments: '"C:\ProgramData\Package Cache\4CB2DF5E5A135BDBDFDF26DD2F145C573A238DF0\OrthancInstaller-Win64-17.7.0.exe" /VERYSILENT /SUPPRESSMSGBOXES'
[1098:0F54][2017-12-23T13:35:40]e000: Error 0x80070001: Process returned error: 0x1
[1098:0F54][2017-12-23T13:35:40]e000: Error 0x80070001: Failed to execute EXE package.
[1004:11F8][2017-12-23T13:35:40]e000: Error 0x80070001: Failed to configure per-machine EXE package.
[1004:11F8][2017-12-23T13:35:40]i319: Applied execute package: OrthancInstaller_Win64_17.7.0.exe, result: 0x80070001, restart: None
[1004:11F8][2017-12-23T13:35:40]e000: Error 0x80070001: Failed to execute EXE package.
[1098:0F54][2017-12-23T13:35:40]i351: Removing cached package: OrthancInstaller_Win64_17.7.0.exe, from path: C:\ProgramData\Package Cache\4CB2DF5E5A135BDBDFDF26DD2F145C573A238DF0\
[1098:0F54][2017-12-23T13:35:40]i326: Removed dependency: {1194278d-99d9-4dfd-badf-32f2c58a3aeb} on package provider: {4FD99DCB-7D98-480C-B535-692049F99F38}, package mongodb_win32_x86_64_2008plus_3.4.1_signed.msi
[1098:0F54][2017-12-23T13:35:40]i301: Applying rollback package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi, action: Uninstall, path: (null), arguments: ' ALLUSERS="1" ARPSYSTEMCOMPONENT="1" MSIFASTINSTALL="7"'
[1004:11F8][2017-12-23T13:35:42]i319: Applied rollback package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi, result: 0x0, restart: None
[1098:0F54][2017-12-23T13:35:42]i329: Removed package dependency provider: {4FD99DCB-7D98-480C-B535-692049F99F38}, package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi
[1098:0F54][2017-12-23T13:35:42]i351: Removing cached package: mongodb_win32_x86_64_2008plus_3.4.1_signed.msi, from path: C:\ProgramData\Package Cache\{4FD99DCB-7D98-480C-B535-692049F99F38}v3.4.1\
[1098:0F54][2017-12-23T13:35:42]i326: Removed dependency: {1194278d-99d9-4dfd-badf-32f2c58a3aeb} on package provider: {4E3C9C11-100B-49F1-927F-0E5CC75FB109}, package node_v6.11.3_x64.msi
[1098:0F54][2017-12-23T13:35:42]i301: Applying rollback package: node_v6.11.3_x64.msi, action: Uninstall, path: (null), arguments: ' ALLUSERS="1" ARPSYSTEMCOMPONENT="1" MSIFASTINSTALL="7"'
[1004:11F8][2017-12-23T13:36:11]i319: Applied rollback package: node_v6.11.3_x64.msi, result: 0x0, restart: None
[1098:0F54][2017-12-23T13:36:11]i329: Removed package dependency provider: {4E3C9C11-100B-49F1-927F-0E5CC75FB109}, package: node_v6.11.3_x64.msi
[1098:0F54][2017-12-23T13:36:11]i351: Removing cached package: node_v6.11.3_x64.msi, from path: C:\ProgramData\Package Cache\{4E3C9C11-100B-49F1-927F-0E5CC75FB109}v6.11.3\
[1098:0F54][2017-12-23T13:36:11]i372: Session end, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{1194278d-99d9-4dfd-badf-32f2c58a3aeb}, resume: None, restart: None, disable resume: No
[1098:0F54][2017-12-23T13:36:11]i330: Removed bundle dependency provider: {1194278d-99d9-4dfd-badf-32f2c58a3aeb}
[1098:0F54][2017-12-23T13:36:11]i352: Removing cached bundle: {1194278d-99d9-4dfd-badf-32f2c58a3aeb}, from path: C:\ProgramData\Package Cache\{1194278d-99d9-4dfd-badf-32f2c58a3aeb}\
[1098:0F54][2017-12-23T13:36:11]i371: Updating session, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{1194278d-99d9-4dfd-badf-32f2c58a3aeb}, resume: None, restart initiated: No, disable resume: No
[1004:11F8][2017-12-23T13:36:12]i399: Apply complete, result: 0x80070001, restart: None, ba requested restart: No
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