Problems when installed Vista-1

Sir,
I have installed windows Xp and directly installs win Vista-1 on my
PC. all are okay but the problem came after opening Calculator,exe on my PC.
It shows A message on a dialogs box containing an error that states that
user32.dll was relocated in memory.this relocation occurred because
Shell32.dll occupied the address range reserved for Windows system dll's
.so it is a major problem for me so please send reply to me how to
troubleshoot this problem. I will be very thankful to you if you send reply.
Thanking you.

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