我一直在研究AngularJS并遵循其安装步骤，但是运行步骤1时出现错误：

npm install -g karma

这是完整的输出：

Microsoft Windows [Version 6.2.9200]
(c) 2012 Microsoft Corporation. All rights reserved.

C:\Users\Travis>node --version
v0.10.18

C:\Users\Travis>python --version
Python 2.7.3

C:\Users\Travis>npm install -g karma
npm http GET https://registry.npmjs.org/karma
npm http 304 https://registry.npmjs.org/karma
npm http GET https://registry.npmjs.org/di
npm http GET https://registry.npmjs.org/socket.io
npm http GET https://registry.npmjs.org/chokidar
npm http GET https://registry.npmjs.org/coffee-script
npm http GET https://registry.npmjs.org/http-proxy
npm http GET https://registry.npmjs.org/colors/0.6.0-1
npm http GET https://registry.npmjs.org/rimraf
npm http GET https://registry.npmjs.org/minimatch
npm http GET https://registry.npmjs.org/mime
npm http GET https://registry.npmjs.org/useragent
npm http GET https://registry.npmjs.org/graceful-fs
npm http GET https://registry.npmjs.org/lodash
npm http GET https://registry.npmjs.org/log4js
npm http GET https://registry.npmjs.org/q
npm http GET https://registry.npmjs.org/glob
npm http GET https://registry.npmjs.org/connect
npm http GET https://registry.npmjs.org/optimist
npm http 304 https://registry.npmjs.org/socket.io
npm http 304 https://registry.npmjs.org/di
npm http 304 https://registry.npmjs.org/chokidar
npm http 304 https://registry.npmjs.org/coffee-script
npm http 304 https://registry.npmjs.org/colors/0.6.0-1
npm http 304 https://registry.npmjs.org/http-proxy
npm http 304 https://registry.npmjs.org/rimraf
npm http 304 https://registry.npmjs.org/minimatch
npm http 304 https://registry.npmjs.org/mime
npm http 304 https://registry.npmjs.org/useragent
npm http 304 https://registry.npmjs.org/graceful-fs
npm http 304 https://registry.npmjs.org/lodash
npm http 304 https://registry.npmjs.org/log4js
npm http 304 https://registry.npmjs.org/q
npm http 304 https://registry.npmjs.org/glob
npm http 304 https://registry.npmjs.org/connect
npm http 304 https://registry.npmjs.org/optimist
npm http GET https://registry.npmjs.org/lru-cache
npm http GET https://registry.npmjs.org/sigmund
npm http GET https://registry.npmjs.org/inherits
npm http GET https://registry.npmjs.org/wordwrap
npm http GET https://registry.npmjs.org/socket.io-client/0.9.16
npm http GET https://registry.npmjs.org/policyfile/0.0.4
npm http GET https://registry.npmjs.org/base64id/0.1.0
npm http GET https://registry.npmjs.org/redis/0.7.3
npm http 304 https://registry.npmjs.org/sigmund
npm http 304 https://registry.npmjs.org/lru-cache
npm http 304 https://registry.npmjs.org/policyfile/0.0.4
npm http 304 https://registry.npmjs.org/base64id/0.1.0
npm http 304 https://registry.npmjs.org/wordwrap
npm http 304 https://registry.npmjs.org/redis/0.7.3
npm http 304 https://registry.npmjs.org/inherits
npm http 304 https://registry.npmjs.org/socket.io-client/0.9.16
npm http GET https://registry.npmjs.org/pkginfo
npm http GET https://registry.npmjs.org/utile
npm http GET https://registry.npmjs.org/qs/0.6.5
npm http GET https://registry.npmjs.org/cookie-signature/1.0.1
npm http GET https://registry.npmjs.org/formidable/1.0.14
npm http GET https://registry.npmjs.org/cookie/0.1.0
npm http GET https://registry.npmjs.org/buffer-crc32/0.2.1
npm http GET https://registry.npmjs.org/send/0.1.4
npm http GET https://registry.npmjs.org/bytes/0.2.0
npm http GET https://registry.npmjs.org/fresh/0.2.0
npm http GET https://registry.npmjs.org/pause/0.0.1
npm http GET https://registry.npmjs.org/uid2/0.0.2
npm http GET https://registry.npmjs.org/debug
npm http GET https://registry.npmjs.org/methods/0.0.1
npm http 304 https://registry.npmjs.org/pkginfo
npm http 304 https://registry.npmjs.org/utile
npm http 304 https://registry.npmjs.org/qs/0.6.5
npm http 304 https://registry.npmjs.org/cookie/0.1.0
npm http 304 https://registry.npmjs.org/cookie-signature/1.0.1
npm http 304 https://registry.npmjs.org/buffer-crc32/0.2.1
npm http 304 https://registry.npmjs.org/send/0.1.4
npm http 304 https://registry.npmjs.org/bytes/0.2.0
npm http 304 https://registry.npmjs.org/fresh/0.2.0
npm http 304 https://registry.npmjs.org/pause/0.0.1
npm http 304 https://registry.npmjs.org/formidable/1.0.14
npm http 304 https://registry.npmjs.org/uid2/0.0.2
npm http 304 https://registry.npmjs.org/debug
npm http 304 https://registry.npmjs.org/methods/0.0.1
npm http GET https://registry.npmjs.org/range-parser/0.0.4
npm http GET https://registry.npmjs.org/i
npm http GET https://registry.npmjs.org/mkdirp
npm http GET https://registry.npmjs.org/deep-equal
npm http GET https://registry.npmjs.org/ncp
npm http GET https://registry.npmjs.org/async
npm http 304 https://registry.npmjs.org/range-parser/0.0.4
npm http 304 https://registry.npmjs.org/deep-equal
npm http 304 https://registry.npmjs.org/ncp
npm http 304 https://registry.npmjs.org/async
npm http GET https://registry.npmjs.org/dequeue/1.0.3
npm http GET https://registry.npmjs.org/async/0.1.15
npm http GET https://registry.npmjs.org/semver
npm http 304 https://registry.npmjs.org/mkdirp
npm http 304 https://registry.npmjs.org/i
npm http GET https://registry.npmjs.org/readable-stream
npm http 304 https://registry.npmjs.org/dequeue/1.0.3
npm http 304 https://registry.npmjs.org/async/0.1.15
npm http 304 https://registry.npmjs.org/readable-stream
npm http 304 https://registry.npmjs.org/semver
npm http GET https://registry.npmjs.org/xmlhttprequest/1.4.2
npm http GET https://registry.npmjs.org/uglify-js/1.2.5
npm http GET https://registry.npmjs.org/ws
npm http GET https://registry.npmjs.org/active-x-obfuscator/0.0.1
npm http 304 https://registry.npmjs.org/xmlhttprequest/1.4.2
npm http 304 https://registry.npmjs.org/uglify-js/1.2.5
npm http 304 https://registry.npmjs.org/active-x-obfuscator/0.0.1
npm http 304 https://registry.npmjs.org/ws
npm http GET https://registry.npmjs.org/zeparser/0.0.5
npm http 304 https://registry.npmjs.org/zeparser/0.0.5
npm http GET https://registry.npmjs.org/tinycolor
npm http GET https://registry.npmjs.org/commander
npm http GET https://registry.npmjs.org/nan
npm http GET https://registry.npmjs.org/options
npm http 304 https://registry.npmjs.org/nan
npm http 304 https://registry.npmjs.org/options
npm http 304 https://registry.npmjs.org/commander
npm http 304 https://registry.npmjs.org/tinycolor

> ws@0.4.30 install C:\Users\Travis\AppData\Roaming\npm\node_modules\karma\node_modules\socket.io\node_modules\socket.io
-client\node_modules\ws
> (node-gyp rebuild 2> builderror.log) || (exit 0)


C:\Users\Travis\AppData\Roaming\npm\node_modules\karma\node_modules\socket.io\node_modules\socket.io-client\node_modules
\ws>node "C:\Program Files (x86)\nodejs\node_modules\npm\bin\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node-gyp.js"
rebuild
Building the projects in this solution one at a time. To enable parallel build, please add the "/m" switch.
C:\Users\Travis\AppData\Roaming\npm\node_modules\karma\node_modules\socket.io\node_modules\socket.io-client\node_module
s\ws\build\bufferutil.vcxproj(18,3): error MSB4019: The imported project "C:\Microsoft.Cpp.Default.props" was not found
. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.
C:\Users\Travis\AppData\Roaming\npm\node_modules\karma\node_modules\socket.io\node_modules\socket.io-client\node_module
s\ws\build\validation.vcxproj(18,3): error MSB4019: The imported project "C:\Microsoft.Cpp.Default.props" was not found
. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.
C:\Users\Travis\AppData\Roaming\npm\karma -> C:\Users\Travis\AppData\Roaming\npm\node_modules\karma\bin\karma
karma@0.10.2 C:\Users\Travis\AppData\Roaming\npm\node_modules\karma
├── di@0.0.1
├── rimraf@2.1.4
├── colors@0.6.0-1
├── graceful-fs@1.2.3
├── mime@1.2.11
├── chokidar@0.6.3
├── q@0.9.7
├── coffee-script@1.6.3
├── minimatch@0.2.12 (sigmund@1.0.0, lru-cache@2.3.1)
├── glob@3.1.21 (inherits@1.0.0)
├── optimist@0.3.7 (wordwrap@0.0.2)
├── lodash@1.1.1
├── useragent@2.0.7 (lru-cache@2.2.4)
├── connect@2.8.8 (methods@0.0.1, uid2@0.0.2, cookie-signature@1.0.1, pause@0.0.1, fresh@0.2.0, bytes@0.2.0, qs@0.6.5, b
uffer-crc32@0.2.1, cookie@0.1.0, debug@0.7.2, formidable@1.0.14, send@0.1.4)
├── http-proxy@0.10.3 (pkginfo@0.2.3, utile@0.1.7)
├── log4js@0.6.8 (dequeue@1.0.3, semver@1.1.4, async@0.1.15, readable-stream@1.0.17)
└── socket.io@0.9.16 (base64id@0.1.0, policyfile@0.0.4, redis@0.7.3, socket.io-client@0.9.16)

听起来好像正在运行的MSBuild版本（我相信是12.0）无法正确解析文件中的$(VCTargetsPath)变量vcxproj。