control panel files deleted, how to reinstall

[Guest]

When I click on Control Panel or My Computer icon nothing happens. I think
these files were deleted. My daughter was uninstalling McAfee and had to
boot into safe mode to manually delete McAfee. This must have deleted the
files needed for the Control Panel & My Computer.
I tried to reinstall windows XP from the original disk that came with my
computer. It would not re-nstall because it said the version that was being
used is newer than what is on the original disk.
I tried restoring the computer 2 times but this did not help. I will not
let me restore before the date that she deleted McAfee and installed a new
Security Program.
Does anyone have any suggestions on how to fix this problem?

 

[Guest]

First, I had to start my computer in safe mode because when I double-click on
my computer nothing happens. In safe mode I found the system 32 folder. I
found only 2 files, cpl_moh and cpl_moh(2). I double-clicked both files and
got the message "Dell Moden-on-Hold" "X There is no supported modem
installed". I don't know what this means. And the control panel would not
open up. You also asked if I had multiple log ons for this machine. I
regret to say I do not, so I can not log on as a different user.