diff --git a/src/vs/code/electron-browser/sharedProcess/sharedProcessMain.ts b/src/vs/code/electron-browser/sharedProcess/sharedProcessMain.ts
index c8c5fb57de0e6dc6ccf127163efd9e7384d4fa0f..5a361b5f4adb8ab87f8e3fdcc29fb3748017203d 100644
--- a/src/vs/code/electron-browser/sharedProcess/sharedProcessMain.ts
+++ b/src/vs/code/electron-browser/sharedProcess/sharedProcessMain.ts
@@ -45,6 +45,7 @@ import { IDialogService } from 'vs/platform/dialogs/common/dialogs';
 import { IDisposable, dispose } from 'vs/base/common/lifecycle';
 import { IDownloadService } from 'vs/platform/download/common/download';
 import { DownloadServiceChannelClient } from 'vs/platform/download/node/downloadIpc';
+import { DefaultURITransformer } from 'vs/base/common/uriIpc';
 
 export interface ISharedProcessConfiguration {
 	readonly machineId: string;
@@ -91,7 +92,7 @@ function main(server: Server, initData: ISharedProcessInitData, configuration: I
 	services.set(IDialogService, new DialogChannelClient(dialogChannel));
 
 	const downloadChannel = server.getChannel('download', { routeCall: route, routeEvent: route });
-	services.set(IDownloadService, new DownloadServiceChannelClient(downloadChannel));
+	services.set(IDownloadService, new DownloadServiceChannelClient(downloadChannel, DefaultURITransformer));
 
 	const instantiationService = new InstantiationService(services);
 
diff --git a/src/vs/platform/download/node/downloadIpc.ts b/src/vs/platform/download/node/downloadIpc.ts
index 89b77323fc8d91d72631fa98423002cf38b15bf7..8dca2440d291c6765730a163772cada588b133d5 100644
--- a/src/vs/platform/download/node/downloadIpc.ts
+++ b/src/vs/platform/download/node/downloadIpc.ts
@@ -14,6 +14,7 @@ import { Event, Emitter, buffer } from 'vs/base/common/event';
 import { IDownloadService } from 'vs/platform/download/common/download';
 import { mkdirp } from 'vs/base/node/pfs';
 import { onUnexpectedError } from 'vs/base/common/errors';
+import { IURITransformer } from 'vs/base/common/uriIpc';
 
 export type UploadResponse = Buffer | Error | undefined;
 
@@ -75,7 +76,7 @@ export class DownloadServiceChannel implements IDownloadServiceChannel {
 
 	listen(event: string, arg?: any): Event<any> {
 		switch (event) {
-			case 'upload': return buffer(upload(arg));
+			case 'upload': return buffer(upload(URI.revive(arg)));
 		}
 		return undefined;
 	}
@@ -89,9 +90,10 @@ export class DownloadServiceChannelClient implements IDownloadService {
 
 	_serviceBrand: any;
 
-	constructor(private channel: IDownloadServiceChannel) { }
+	constructor(private channel: IDownloadServiceChannel, private uriTransformer: IURITransformer) { }
 
 	download(from: URI, to: string): TPromise<void> {
+		from = this.uriTransformer.transformOutgoing(from);
 		const dirName = path.dirname(to);
 		let out: fs.WriteStream;
 		return new TPromise((c, e) => {
diff --git a/src/vs/platform/extensionManagement/common/extensionManagementIpc.ts b/src/vs/platform/extensionManagement/common/extensionManagementIpc.ts
index 40048fe5efa92a19a2035c0edd28a1cd5fe4a999..236e45979b3475ec3728fe49348ac12e41875778 100644
--- a/src/vs/platform/extensionManagement/common/extensionManagementIpc.ts
+++ b/src/vs/platform/extensionManagement/common/extensionManagementIpc.ts
@@ -87,15 +87,15 @@ export class ExtensionManagementChannelClient implements IExtensionManagementSer
 	get onDidUninstallExtension(): Event<DidUninstallExtensionEvent> { return this.channel.listen('onDidUninstallExtension'); }
 
 	zip(extension: ILocalExtension): TPromise<URI> {
-		return this.channel.call('zip', [extension]).then(result => URI.revive(this.uriTransformer.transformIncoming(result)));
+		return this.channel.call('zip', [this._transformOutgoing(extension)]).then(result => URI.revive(this.uriTransformer.transformIncoming(result)));
 	}
 
 	unzip(zipLocation: URI): TPromise<void> {
-		return this.channel.call('unzip', [zipLocation]);
+		return this.channel.call('unzip', [this.uriTransformer.transformOutgoing(zipLocation)]);
 	}
 
 	install(vsix: URI): TPromise<void> {
-		return this.channel.call('install', [vsix]);
+		return this.channel.call('install', [this.uriTransformer.transformOutgoing(vsix)]);
 	}
 
 	installFromGallery(extension: IGalleryExtension): TPromise<void> {
diff --git a/src/vs/workbench/electron-browser/shell.ts b/src/vs/workbench/electron-browser/shell.ts
index 00236f97a7bb418b984f6f9ae94e0a47cbf1fc6f..d440340a68b445fbf84f369d799a05a2f1bb4200 100644
--- a/src/vs/workbench/electron-browser/shell.ts
+++ b/src/vs/workbench/electron-browser/shell.ts
@@ -339,7 +339,7 @@ export class WorkbenchShell extends Disposable {
 
 		sharedProcess
 			.done(client => {
-				client.registerChannel('download', instantiationService.createInstance(DownloadServiceChannel));
+				client.registerChannel('download', new DownloadServiceChannel());
 				client.registerChannel('dialog', instantiationService.createInstance(DialogChannel));
 			});