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In January and February , Redmond emitted fixes for Windows 7 and Server 2008 R2 machines to counter the Meltdown chip - level vulnerability in modern Intel x64 processors .
 Redmond: releaser; February: time; January: time; fixes: patch; Windows 7: vulnerable system; machines: vulnerable system; Server 2008 R2: vulnerable system
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: patch vulnerability 
  Option: issues addressed, patch, vulnerability, time, vulnerable system version, releaser, patch number, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 Redmond: releaser; February: time; January: time; fixes: patch; Windows 7: vulnerable system; machines: vulnerable system; Server 2008 R2: vulnerable system