docs: explain solutions for Windows maxpath limitation

Fixes #1162

Author: stephenplusplus

docs/troubleshooting.md

@@ -6,6 +6,18 @@ See "I'm not using Compute Engine. What do I need to do?" from the [FAQ](https:/
 
 Reference Issue: [#261](https://github.com/GoogleCloudPlatform/gcloud-node/issues/261)
 
+
+## The app crashes with an error: "The system cannot find the path specified"
+
+Windows users may face this issue when using npm modules such as `gcloud-node`, see ["Node's nested node_modules approach is basically incompatible with Windows"](https://github.com/nodejs/node-v0.x-archive/issues/6960#issuecomment-46704998). There are 3 solutions you should try:
+
+  1. Install npm version 3 or greater, which [dedupes](https://docs.npmjs.com/cli/dedupe) by default
+  1. Manually run `npm dedupe` from inside your project directory
+  1. Move your project to the `C:\` directory
+
+Reference Issue: [#1162](https://github.com/GoogleCloudPlatform/gcloud-node/issues/1162)
+
+
 ## My requests are returning errors instructing me to retry the request.
 
 If you ever see an error like this, you might be pinging the API too rapidly, hitting a rate limit: