Thank you Tashi, that is a relief! Rather than open another thread may I please put another question again I suspect the problem may well be my ignorance.
When I use system internals and click 'check' I get the same 4 results. I fix them but when I check again they are still there?? Details are attached.
These 'errors' are on windows 7 home premium 64 bit machine, I have also exactly the same result on windows 7 professional 64 bit machine but on my windows 7 home premium 32 bit do not get these results.
Are they normal please?
Thank you
Caradog