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#11
The eMachines T2885 Desktop PC supports a maximum of 1 GB (512 MB x 2) of DDR PC2100 RAM.
I have no idea how you got 4 GB in yours, unless its original motherboard was replaced.
What processor and graphics card did you upgrade it to?
Does it still have its original CD-RW and DVD-ROM disc drives?
There is no known BIOS update for it.