Exception with MySQL gem for Rails installing in Win 7

Good times for everyone. I have such problem, feeling that it's simple, but due to I'm beginner I don't know the way to solve it: I'm trying to install mysql-gem for Ruby on Rails project in Wind开发者_开发问答ows. I've installed RubyGems succesfully, then command

 RubyGems installed the following executables:
    c:/Ruby19/bin/gem


D:\temp\ruby_sites\rubygems-1.8.10>
D:\temp\ruby_sites\rubygems-1.8.10>gem install mysql
ERROR:  While executing gem ... (Errno::EACCES)
Permission denied - C:/Users/Джестон/.gem/specs/rubygems.org%80/quick/Marshal.4.8/mysql-2.8.1.gemspec

D:\temp\ruby_sites\rubygems-1.8.10>

Please, hint me how to solve this problem. Turning off the antivirus software doesn't help. Thanks for help!

---

gem installs stuff for admin user on your machine, so you need to start the command prompt as admin. (type cmd and instead of hitting enter, press ctrll+shift+enter to start command prompt as admin)

even if your account on windows (through which you logged in) is of type admin, it won't be enough. this is analogous to mac, wherein you use a "sudo" before doing similar stuff. hope this helps!