菜鳥請教

買了一台舊計算機,發現我不能保存如何東西, 也不能卸裝和安裝任何軟件, 因為每次操作後關機, 再啟動計算機,她會顯示:
Do not save to c:\drive, file will be lost on reboot
按ok後顯示:
new hardware found
然後再一個顯示:
add new hardware wizard
this wizard searches for new drivers for
plug and play monitor
a device driver is a software program that make a hardware device work
按next後出現:
what do you want windows to do
下麵兩個選擇, 那個recommonded 是:
search for best driver for your device
按next 後顯示:
windows will search for new drivers in it driver database on your hard drive,and in any following selected location, click next to start search
下麵是四個選擇:
floppy disk drives
CD-Rom drive
Microsoft windows update
specify a location

然後是一係列的動作, 啟動後發現刪除的東西又回來了, 保存的東西不見了.

我想可能是計算機設置上的問題, 但無從下手.
請大蝦指教. 謝謝