Freshly downloaded JBDS 8.0.0 from http://www.jboss.org/products/devstudio/get-started

update results in:
An error occurred while uninstalling session context was:(profile=jbds, phase=org.eclipse.equinox.internal.p2.engine.phases.Uninstall,
operand=[R]
com.jboss.devstudio.core.package.executable.win32.win32.x86_64
8.0.0.GA-v20141020-1042-B317 --> null,
action=org.eclipse.equinox.internal.p2.touchpoint.natives.actions.C
leanupzipAction).
Backup of file D:\gettingstarted2\jbds8ga\studio\jbdevstudio.exe failed.
File that was copied to backup could not be deleted: D:
\gettingstarted2\jbds8ga\studio\jbdevstudio.exe

Video:
http://screencast.com/t/dCkzlin17