Ok Boggin, time for an update
Had another go at the system restore and this time it completed with no errors so no idea what the issue was there
so I now have one!!
Ran an SFC after deleting the pending.xml file and it ran ok but found errors it was unable to fix (as usual) so ran the SFCFix which found the following
AutoAnalysis::
CORRUPT: C:\Windows\winsxs\amd64_microsoft-windows-i..e-trigramdictionary_31bf3856ad364e35_6.1.7600.16385_none_12d6b2e3587e9b12\PINTLGT.IMD
SUMMARY: Some corruptions could not be fixed automatically. Seek advice from helper or sysnative.com.
CBS & SFC total detected corruption count: 1
CBS & SFC total unimportant corruption count: 0
CBS & SFC total fixed corruption count: 0
SURT total detected corruption count: 68
SURT total unimportant corruption count: 0
SURT total fixed corruption count: 0
AutoAnalysis:: directive completed successfully.
This has been an issue for a while now and I guess needs the input of someone on the sysnative forums, but doesn't seem to be causing any problems with the OS or anything noticeable as yet...
Also managed to (partially) resolve the browser issue as well - after some googling and (Windows) exploring I discovered that a new profile folder had been created yesterday - don't know why!
- but wouldn't let me delete it due to an "extensions" folder which I also couldn't take control of with permissions, so I copied all (except the extensions folder) of the old profile contents into the new one and now I have my bookmarks and history back - big yays for that!
only downside is my extensions have all gone and for some reason it won't let me re-install any of them
so I'll have to do more digging on that score...