Estou tentando usar o Angular-CLI para instalar um novo aplicativo Angular2, mas continue executando o seguinte problema:

ng new payment-calc-app

Após "Instalar pacotes para ferramentas via npm", recebo os seguintes códigos de erro:

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm ERR! path C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\.staging\rxjs-ccea9159
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall rename
npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\.staging\rxjs-ccea9159' -> 'C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\rxjs'
npm ERR!     at destStatted (C:\Users\jweston\AppData\Roaming\npm\node_modules\npm\lib\install\action\finalize.js:29:7)
npm ERR!     at C:\Users\jweston\AppData\Roaming\npm\node_modules\npm\node_modules\graceful-fs\polyfills.js:284:29
npm ERR!     at FSReqWrap.oncomplete (fs.js:123:15)
npm ERR!
npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\.staging\rxjs-ccea9159' -> 'C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\rxjs'
npm ERR!     at Error (native)
npm ERR!  { Error: EPERM: operation not permitted, rename 'C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\.staging\rxjs-ccea9159' -> 'C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\rxjs'
npm ERR!     at destStatted (C:\Users\jweston\AppData\Roaming\npm\node_modules\npm\lib\install\action\finalize.js:29:7)
npm ERR!     at C:\Users\jweston\AppData\Roaming\npm\node_modules\npm\node_modules\graceful-fs\polyfills.js:284:29
npm ERR!     at FSReqWrap.oncomplete (fs.js:123:15)
npm ERR!
npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\.staging\rxjs-ccea9159' -> 'C:\Users\jweston\Documents\Apps\payment-calc-app\node_modules\rxjs'
npm ERR!     at Error (native) parent: 'payment-calc-app' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\jweston\AppData\Roaming\npm-cache\_logs\2017-03-23T19_17_36_190Z-debug.log

Package install failed, see above.

eu tenteinpm clean cache e executando o prompt de comando como administrador (estou no Windows) sem sucesso.

Curiosamente, quando vou tentar excluir as pastas que a instalação com falha criou, o Windows me impede de excluí-las, dizendo que preciso ser um administrador para excluí-las, mesmo sendo administrador. Eu preciso ir para cada pasta individual e excluir cada arquivo individual, um de cada vez.