I had the same problem when a partition i was trying to make didnt work. Do this below and try making the partition again. If the same happens do the below again lol.
(I found this in under 10 secs with google, always look there before posting here.)
1. Exit all programs.
2. On the Windows taskbar, click Start > Run.
3. In the Run dialog box, type the following:
regedit
4. Click OK.
5. In the Registry Editor, navigate to the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager
6. In the right pane, double-click the following value.
BootExecute
The Edit String dialog box appears.
7. Remove the line that references Xmnt2002.
For example, if the data value of BootExecute is:
autocheck xmnt2002 /bat="C:\WINDOWS\TEMP\PQ_BATCH.PQB" /win="C:\WINDOWS" /dbg="C:\WINDOWS\TEMP\PQ_DEBUG.TXT" /ver=262144 /prd="PartitionMagic"
autocheck autochk *
then remove the first line so that the value looks like the following:
autocheck autochk *
8. Click OK.
9. Exit the Registry Editor.
10. Reboot the computer.