Installation Error: Error 1718 – da09a.msi was rejected by digital signature policy
Read the notes http://www.vmware.com/support/server2/doc/releasenotes_vmserver2.html
Try:
Click Start -> Control Panel -> Open Administrative Tools
Open Local Security Settings ->Click Software Restriction Policies
If no software restrictions are defined, right click the Software Restriction Policies node and select New Software Restriction Policy
Double click Enforcement
Select “All users except local administrators”
Click OK
Reboot the machine
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