bad data file

I'm getting the following errors. can it be fixed?

ora 8.1.6, win2k pro

EXP-00056: ORACLE error 1115 encountered
ORA-01115: IO error reading block from file 3 (block # 94834)
ORA-01110: data file 3: 'C:\ORA81\ORADATA\ORACLE\USERS01.DBF'
ORA-27091: skgfqio: unable to queue I/O
OSD-04006: ReadFile() failure, unable to read from file
O/S-Error: (OS 23) Data error (cyclic redundancy check).