I´m configuring windows server backup as full system backup. It starts fine, but when it´s making system drive (c:) backup it stops at 40% every time i try. It only backups 7.28 GB of the total 18.19 GB. I tried changing destination drive and also checking c: filesystem in order to find any problem, but it seems to be ok and the problem is still the same. I got a message telling that the backup is completed with warnings. The warning details says that it didn´t complete backup because of input/output error in source or destination. Thanks for your help.
Finally real problem appeared. System hard drive has erro blocks. At first times diks checks seemed to be ok, but finally OS didn´t boot after one upgrade, so testing hard drive with HDDRegenerator i could find several blocks with errors. HDDregenerator fixed the block apparently but the errors cames again. After changing the hard drive and reinstalling it makes system backup fine. Thanks.