the partitions I cannot access anymore are my datas partition, else still have two partitions with OS.
Now, the partitions were shared on network and sharing still active (gone a try to access them from remote computer but doubt that)..the security tab does not give any owner name listed (everybody, administrator..)
Tried to take ownership through elevated administrator command prompt but answer there is still the same: acess denied.
I cross finger for someone to help me, else will have to delete and format the partitions and loose all my datas!
So thank you in advance for an effective cure!