环境：
MyEclipse Enterprise Workbench
Version: 10.6
Build id: 10.6-20120727
故障现象：
安装pydev过程中报如下错误
An error occurred while collecting items to be installed
session context was:(profile=com.poweredbypulse.profile-0-rb-5513151-1492558087752, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: osgi.bundle,com.python.pydev,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile6771126166501550159.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile6771126166501550159.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.analysis,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile188292955749531124.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile188292955749531124.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.codecompletion,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile2992465887287578110.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile2992465887287578110.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.debug,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile5590361135435317761.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile5590361135435317761.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.fastparser,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile5289972695934899130.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile5289972695934899130.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.refactoring,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile498251358420137482.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile498251358420137482.jar
Problems downloading artifact: osgi.bundle,org.python.pydev,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile2908256587262194970.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile2908256587262194970.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.ast,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile1018090722122949935.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile1018090722122949935.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.core,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile4798922512297347174.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile4798922512297347174.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.customizations,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile5395791687538331113.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile5395791687538331113.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.debug,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile1996771363066592085.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile1996771363066592085.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.django,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile5719404974179328237.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile5719404974179328237.jar
Problems downloading artifact: org.eclipse.update.feature,org.python.pydev.feature,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile2969159375068624332.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile2969159375068624332.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.help,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile650687853456765435.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile650687853456765435.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.jython,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile3569460679434979882.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile3569460679434979882.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.parser,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile5664164891523406971.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile5664164891523406971.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.refactoring,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile2221958571621387923.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile2221958571621387923.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.shared_core,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile2958984972779166275.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile2958984972779166275.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.shared_interactive_console,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile2811238523118869929.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile2811238523118869929.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.shared_ui,5.7.0.201704111357.
Error reading signed content:D:\Users\zhengyl\AppData\Local\Temp\signatureFile1657656583755554778.jar
An error occurred while processing the signatures for the file: D:\Users\zhengyl\AppData\Local\Temp\signatureFile1657656583755554778.jar
