OH2 error on startup Z:\OH2\addons does not exist

full error below, i haven’t got a Z drive in use, and haven’t made any changes recently…

These are the first lines in the log after a restart

2017-03-06 18:10:24.380 [WARN ] [org.apache.felix.fileinstall ] - Z:\OH2\addons does not exist, please create it.
2017-03-06 18:10:24.453 [ERROR] [org.apache.felix.fileinstall ] - Cannot create folder Z:\OH2\userdata\tmp\bundles. Is the folder write-protected?
2017-03-06 18:10:24.454 [ERROR] [org.apache.felix.configadmin ] - [org.osgi.service.cm.ManagedServiceFactory, id=36, bundle=4/mvn:org.apache.felix/org.apache.felix.fileinstall/3.5.6]: Unexpected problem updating configuration org.apache.felix.fileinstall.9c0d1b96-fe8f-4678-ad96-138ad5e776a2
java.lang.RuntimeException: Cannot create folder: Z:\OH2\userdata\tmp\bundles
at org.apache.felix.fileinstall.internal.DirectoryWatcher.prepareDir(DirectoryWatcher.java:638)[4:org.apache.felix.fileinstall:3.5.6]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.prepareTempDir(DirectoryWatcher.java:618)[4:org.apache.felix.fileinstall:3.5.6]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.(DirectoryWatcher.java:175)[4:org.apache.felix.fileinstall:3.5.6]
at org.apache.felix.fileinstall.internal.FileInstall.updated(FileInstall.java:247)[4:org.apache.felix.fileinstall:3.5.6]
at org.apache.felix.fileinstall.internal.FileInstall$ConfigAdminSupport$Tracker.updated(FileInstall.java:377)[4:org.apache.felix.fileinstall:3.5.6]
at org.apache.felix.cm.impl.helper.ManagedServiceFactoryTracker.updated(ManagedServiceFactoryTracker.java:159)[3:org.apache.felix.configadmin:1.8.12]
at org.apache.felix.cm.impl.helper.ManagedServiceFactoryTracker.provideConfiguration(ManagedServiceFactoryTracker.java:93)[3:org.apache.felix.configadmin:1.8.12]
at org.apache.felix.cm.impl.ConfigurationManager$ManagedServiceFactoryUpdate.provide(ConfigurationManager.java:1620)[3:org.apache.felix.configadmin:1.8.12]
at org.apache.felix.cm.impl.ConfigurationManager$ManagedServiceFactoryUpdate.run(ConfigurationManager.java:1563)[3:org.apache.felix.configadmin:1.8.12]
at org.apache.felix.cm.impl.UpdateThread.run0(UpdateThread.java:141)[3:org.apache.felix.configadmin:1.8.12]
at org.apache.felix.cm.impl.UpdateThread.run(UpdateThread.java:109)[3:org.apache.felix.configadmin:1.8.12]
at java.lang.Thread.run(Unknown Source)[:1.8.0_121]