【多选题】
What needs to be done before you can start the upgrade?（）<br /> <img src="https://nimg.ppkao.com/2018-07/zhanglijun/2018073017485275935.jpg?sign=3bc97c1d961b55dcd4d7c8bba647cd6f&t=62d3e41e" />
A、On the Windows 95 computer， replace the CPU with a faster model.
B、On the Windows 95 computer， reformat the disk with FAT32.
C、On the Windows 98 computer， reformat the disk with FAT32.
D、On the Windows 98 computer， increase the amount of free disk space on the hard disk.
E、On the Windows NT Workstation 4.0 computer， replace the CPU with a faster model.
F、On the Windows NT Workstation 4.0 computer， increase the amount of free disk space on the hard disk.
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