Just installed this thing and everything works great but I'm not displaying full screen. can this be remedied??

truiz9902@hotmail.com
Syst. info
Dimension 4100
P3 933MHz
256 MB 133MHz SDRAM
40GB Ultra ATA 7200 rpm. HD
19" P991 .24AG monitor(extra lines free)
32MB NVIDIA TNT2 M64 AGP GC
SB LIVE! Value digital w/ Music Match Match soft.
8x/4x/32x CD-RW
HK-695 surround sound w/sub
OS Windows ME