Edited Issue: Error accessing package json cache [1262]

VS is not running
I deleted the package json cache from %localappdata%
Start VS
Create new project
Install npm package
This will take a while to download all packages, close the dialog before it's done
Install npm package again

Error:
```
---------------------------
Microsoft Visual Studio Express 2013 for Web
---------------------------
The process cannot access the file 'C:\Users\huvalo\AppData\Local\Microsoft\Node.js Tools\packagecache.json' because it is being used by another process.
---------------------------
OK
---------------------------
```