Tie cpu co tam davali neboli moc 64bitove, takze potom si tam zrejme nikdy nemal 64bitovy Win, ale sa ti len snivalo. Licencnu nalepku zospodu mas k jakemu OS?
CPU Napr.
http://ark.intel.com/products/27243/Intel-Core-Sol o-Processor-T1350-2M-Cache-1_86-GHz-533-MHz-FSB
32-bit

Ak by si nahodou mal 64bit cpu tak skus do biosu load defaults a save&exit (pripadne si poriadne pozri aj cpu podmenu)
Inac nechapem naco tam chces cpat 64bit Win, ked to viac jak 4GB RAM urcite nepodporuje.